Detailed Instructions: In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
Q: Al Jazeera's Hashem Ahelbarra discusses the situation in Yemen A coalition of Yemeni opposition parties has offered to talk with the country's vice-president about a political transition, but a high-ranking government source says no dialogue can take place until president Ali Abdullah Saleh returns to Yemen. Sources from the Joint Meeting Parties (JMP) told Al Jazeera on Monday they were willing to talk with Abdu-Rabbu Mansour Hadi, Yemen's acting leader, about a transition. Hadi was tasked with running the government after Saleh left for medical treatment in Saudi Arabia earlier this week. But a source close to Saleh dismissed the JMP's offer as "ridiculous," and said no political dialogue could take place until Saleh returned. "Saleh is still the president of Yemen," the source said. "The answer of the government was the following, that Saleh remains the ultimate constitutional authority of the government ... So basically, they are telling them 'sorry, we are not going to talk about it'," Al Jazeera's Hashem Ahelbarra said about the government's response. "[The opposition is] under tremendous pressure from the thousands of pro-democracy activists across the country to take a very agressive role and jump in, reinforcing a new agenda in Yemen. If they fail to do that, definitely, they will lose more support in Yemen," Ahelbarra added. Saleh was injured in an attack on his palace on Friday. He is believed to have undergone a surgery to remove shrapnel from his chest. He also reportedly suffers from burns over 40 per cent of his body. Hadi said on Monday that Saleh's health was improving and that he "would return to the homeland in the coming days", but medical sources said he would need at least two weeks to recover in Saudi Arabia. 'An immediate transition' Saleh's son and several of his nephews remain in Yemen, and they control powerful branches of the military and intelligence services, giving Saleh a continued grip on power even in his absence. Hadi - typically a behind-the-scenes player in Yemeni politics - has kept a relatively low profile since Saleh's departure. It is unclear how much power he actually wields. He is still working from his office in the ministry of defence, while Saleh's son Ahmed has reportedly moved into the presidential palace. American and European leaders have called for Saleh to hand over power to a new leader. "We think an immediate transition is in the best interests of the Yemeni people," Hillary Clinton, secretary of state, said on Monday. For her part, Catherine Ashton, the European Union's foreign policy chief, said she hoped Saleh would let his country "move on" while he sought medical treatment in Saudi Arabia. More than 450 people have been killed in the unrest shaking the nation of 23 million since late January. Fighting continues Meanwhile, a Saudi-negotiated truce was holding shakily in Sanaa, the Yemeni capital, after two weeks of fighting between Saleh's forces and a powerful tribal group in which more than 200 people were killed. Fighting raged between Yemeni troops and suspected al-Qaeda gunmen at the gates of Zinjibar, the southern city which had earlier fallen under the group's control. Yemen's military said it had killed 30 of the group's fighters on Tuesday, including a local al-Qaeda leader. Taiz, Yemen's second largest city, was reportedly seized by armed dissidents, following clashes with troops loyal to Saleh, Sheikh Hammoud Saeed al-Mikhlafi, the head of the tribal council in Taiz told the AFP news agency. "I consider Taiz to have fallen under the control" of the dissidents, he said. However, according to Al Jazeera's sources, a senior opposition member in Taiz denied these reports, saying the presidential palace and governor building were still in the hands of forces loyal to President Saleh. He explained that security and army forces withdrew from major parts of Taiz on Monday, but that did not mean that pro-opposition tribal gunmen, and those who had defected, were controlling the city. Sporadic clashes continued across Yemen and at least six people were killed on Monday after government supporters opened fire on opposition fighters. Elsewhere, Saudi television reported that three border guards were killed by someone trying to sneak across the border from Yemen. ||||| (CNN) -- Tribal fighters took control of a top Yemeni city on Tuesday, a setback for an embattled government whose wounded president is hospitalized in Saudi Arabia. 
  
 More than 400 tribal gunmen took over Taiz in southwest Yemen, witnesses there said. 
  
 Government forces have been regrouping in an effort to re-enter the city. Yemen's government has faced international criticism for excessive use of force against anti-regime protesters and the deaths of anti-government demonstrators in Taiz. 
  
 Are you in Yemen? Share your photos and videos from the scene, but please stay safe. 
  
 Meanwhile, President Ali Abdullah Saleh was in Saudi Arabia Tuesday, recovering from burns over 40% of his body and a collapsed lung, a U.S. government official briefed on the matter said. 
  
 Whether he will return to Yemen remained uncertain. 
  
 Saleh was wounded Friday in an attack at his presidential compound. An Arab diplomatic source with knowledge of Saleh's condition said one shrapnel wound was 7 centimeters (2.75 inches) deep. 
  
 Fighting between government and tribal forces has been raging in the capital of Sanaa, where thousands of anti-government protesters have been pressuring Saleh to give up power since January. And there has been unrest elsewhere. 
  
 At least 15 people were killed in Abyan Monday night and Tuesday morning in clashes between Islamic militants and security forces, according to a security source in Abyan. 
  
 Al Qaeda in the Arabian Peninsula has a presence in the southern province of Abyan, a U.S. official said. It's also home to an Islamic militant movement that has targeted government troops in recent days. 
  
 The Abyan dead include nine soldiers, four militants and two civilians in Zinjibar and other suburbs in the province, according to the source, who asked to not be named because he is not authorized to speak to the media. 
  
 There was also violence along the Saudi-Yemeni border, where there have long been concerns of infiltration by militants. 
  
 A man trying to cross into Yemen from Saudi Arabia early Tuesday fatally shot two security officers and wounded another, the state-run Saudi Press Agency said Tuesday. 
  
 The man, described as an "infiltrator" who tried to cross the metal-and-sand barriers at the border, fired at the security officers when they approached him, the agency said. Security personnel tracked the man and he was killed in an exchange of fire, it added. 
  
 The turmoil in Yemen peaked Friday, when a mosque in Saleh's presidential compound was attacked. Yemen's state-run news agency SABA, citing a source in Saleh's office, reported last week that three guards and an imam were killed. 
  
 Western diplomats said the attack came from a bomb. Yemeni investigations are "focusing on what happened inside the mosque," not a rocket or mortar attack, diplomats said Monday. One diplomat said the attack was not a suicide bombing and that the Yemeni investigation was ongoing. 
  
 The description of the attack as a bombing differs from what a Yemeni official told CNN last week. The official, who asked not to be identified, said that Saleh was in the mosque when two "projectiles" were fired during Friday prayers. 
  
 Supporters of Sadeq Al-Ahmar, leader of the Hashed tribe and an opponent of the Yemeni government, were suspected in the attack. 
  
 In response, Yemeni security forces shelled Al-Ahmar's home Friday, killing 10 people and wounding 35 others, according to Fawzi Al-Jaradi, an official with the Hashed tribal confederation. 
  
 After Saleh was taken to Saudi Arabia for treatment, the tribal leader and Vice President Abed Rabbo Mansour Hadi -- Yemen's interim leader -- agreed on a cease-fire, said Abdulqawi Al-Qaisi, spokesman for the Hashed leader. 
  
 Yemen's largest opposition bloc has vowed to prevent Saleh from returning. 
  
 "The Yemeni people will do all in their power to not allow Saleh to re-enter the country," Joint Meeting Parties spokesman Mohammed Qahtan said Sunday. 
  
 A U.S. government official said Monday he could not imagine the Saudis letting Saleh return. He said it was critical that the Saudis press Saleh to accept a Gulf Cooperation Council deal offering him immunity in exchange for stepping down. 
  
 Saudi state-run Ekhbariya television reported Monday that Saleh had undergone two operations in Saudi Arabia and would return to Yemen after he recovers. 
  
 A U.S. official told CNN Monday that the unrest makes U.S. counterterrorism efforts in Yemen "more difficult." 
  
 "We rely on the Yemeni government as partners," the official said. "The more the government is distracted by the political unrest, the more difficult it is for us." 
  
 The Yemeni government has had a "big impact on acquiring information on AQAP," the official said, referring to al Qaeda in the Arabian Peninsula. "If that information flow slows or stops, it inhibits our ability to gather information." 
  
 CNN's Nic Robertson, Elise Labott, Pam Benson, Tim Lister and Jill Dougherty contributed to this report. ||||| Ali Abdullah Saleh, the Yemeni president, suffered "extensive" injuries including severe burns in an attack on his Sana'a palace last week, reducing the chances that he will be able to return home after undergoing treatment in Saudi Arabia. 
  
 Saleh was said on Monday to be in a stable condition in a military hospital in Riyadh after he was operated on by a Saudi-German medical team for shrapnel wounds to his face, neck and chest. 
  
 Aides initially claimed he had suffered only minor injuries, but diplomatic sources estimated that he had received burns to 40% of his body. 
  
 Al-Jazeera Arabic TV reported that he would require cosmetic surgery and quoted Saudi medical sources as saying he would need to recuperate for two weeks before returning to the Yemeni captial, a timeframe which looks far too long in the current uncertain and volatile climate. 
  
 The state news agency Saba reported vice-president Abd-Rabbu Mansour Hadi, now acting leader, as saying the president would return home "in the coming days" after speaking to Saleh by telephone. Yemeni opposition forces have pledged to prevent Saleh's return. 
  
 Mohammad Qahtan, spokesman for the Joint Meeting Parties, said the coalition backed the transfer of presidential powers to Hadi, but as only a temporary rather than a permanent measure. 
  
 Underlining fears about instability and chaos in the country, British naval sources revealed that Royal Marines were on standby off the coast of Yemen to evacuate British citizens. 
  
 The Foreign Office has advised all UK nationals to leave Yemen by commercial means. Britain has already sent 80 commandos aboard one of the Royal Navy's support ships, the Royal Fleet Auxiliary Fort Victoria, to sit off Yemen. It will soon be joined by another RFA vessel, the landing ship Cardigan Bay. The US, Britain and its EU partners are all urging the Saudis to persuade Saleh to stand down by signing a deal drawn up by the Gulf Co-operation Council granting him immunity from prosecution and paving the way for new elections. 
  
 Diplomats said the Saudis had lost patience with Saleh but that a final decision rested with King Abdullah. 
  
 The Saudi cabinet appeared to signal a shift towards the western position by saying it hoped "the Gulf initiative would be signed by all parties to resolve the Yemeni crisis and ... preserve the security and stability of Yemen and its unity". 
  
 The standoff over Saleh's return has focused attention on his sons and nephews, who control key elements of the security forces. Yemeni media reported that several of them had taken part in a meeting chaired by Hadi on Monday. 
  
 A Saudi-brokered truce was largely holding in Sana'a after two weeks of fighting between Saleh's forces and powerful tribal opponents in which more than 200 people were killed and thousands fled in fear of being caught up in the clashes. 
  
 There was fresh fighting in the southern city of Taiz, however, where the UN said it was investigating reports that as many as 50 people have been killed in the past week. |||||
A:
Looks like Ali Abdullah Saleh won’t be making such a quick recovery after all. The Yemeni president has burns over 40% of his body and a collapsed lung, US officials briefed on his condition tell CNN. Though Saleh is now said to be in stable condition, he won’t be ready to leave the Riyadh hospital where he’s being treated for at least two weeks, the Guardian reports. Saleh will also reportedly undergo cosmetic surgery. The president has already undergone surgery to remove shrapnel from his face, neck, and chest; an Arab diplomatic source said one of his wounds was a whopping 2.75 inches deep. The reports all contradict regime pronouncements, which originally said Saleh’s wounds were only minor. But Vice President Abed Rabbo Mansour Hadi refuses to discuss any transition of power until Saleh returns, dismissing opposition offers to negotiate as “ridiculous,” al-Jazeera reports.