In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.

The Obama administration is expelling Syria's most senior envoy in Washington, joining a host of other governments in kicking out Syrian diplomats to protest last week's gruesome massacre in which entire families, including children, were shot execution-style in their homes. 
  
 The State Department said Tuesday that the charge d'affaires at the Syrian Embassy has been given 72 hours to leave the United States. Syria has not had an ambassador in the United States since the previous envoy left last year to take another post. 
  
 State Department spokeswoman Victoria Nuland said the U.S. holds "the Syrian government responsible for this slaughter of innocent lives." 
  
 Earlier Tuesday, numerous other western countries, including Australia, Britain, Canada, France, Germany, Italy, the Netherlands and Spain announced they were expelling Syrian diplomats. ||||| British officials say the U.K. is expelling three Syrian diplomats in protest at the killing of civilians, including the deaths of 108 people shot in their homes last week. 
  
 Officials, who demanded anonymity to discuss the action ahead of a planned public statement from Foreign Secretary William Hague, said Tuesday that Britain was taking the step as part of a coordinated effort with other nations, including France, Germany and Australia. 
  
 Syria's charge d'affaires, Ghassan Dalla, the country's top ranking diplomat in London, is among those being expelled. ||||| France says it is expelling the Syrian ambassador to increase pressure on Damascus amid mounting violence by government forces against civilians and opposition members. 
  
 President Francois Hollande told reporters Tuesday that Ambassador Lamia Shakkour will be notified "today or tomorrow" that she must leave. 
  
 Hollande said that in high-level discussions with British Prime Minister David Cameron and United Nations Secretary General Ban Ki-moon "we decided on a certain number of ... pressure tactics to apply to Syria," including the expulsion. 
  
 Syria's Embassy in Paris could not immediately be reached for comment. 
  
 Hollande also said that Paris will host a meeting in early July of the so-called Friends of Syria seeking a diplomatic solution to the conflict. 
  
 The announcement came amid increasing diplomatic efforts to end the bloodshed and put pressure on Syrian President Bashar Assad. The U.N. said Tuesday that entire families were shot in their homes during a massacre in Syria last week that killed more than 100 people, including children. 
  
 Many Syrian opposition figures are based in France, Syria's onetime colonial ruler. ||||| Australia expelled two Syrian diplomats on Tuesday in response to last week's massacre in Syria that left more than 100 people dead, mostly women and children. 
  
 This frame grab made from an amateur video provided by Syrian activists on Monday, May 28, 2012, purports to show the massacre in Houla on May 25 that killed more than 100 people, many of them children.... (Associated Press) 
  
 This frame grab made from an amateur video provided by Syrian activists on Monday, May 28, 2012, purports to show the massacre in Houla on May 25 that killed more than 100 people, many of them children.... (Associated Press) 
  
 Charge d'Affaires Jawdat Ali, the most senior Syrian diplomat in Australia, and another diplomat from the Syrian Embassy were ordered to leave the country within 72 hours, Australian Foreign Minister Bob Carr told reporters. Carr said he expected other countries to do the same later Tuesday. 
  
 "This is the most effective way we've got of sending a message of revulsion of what has happened in Syria," Carr said. 
  
 Friday's massacre in Houla, a collection of farming villages in Homs province, was one of the deadliest single events in the 15-month-old uprising against Syrian President Bashar Assad's rule. The United Nations said 49 children and 34 women were among the 108 people killed. 
  
 In a statement, Carr called the killings a "hideous and brutal crime" and said Australia would not engage with the Syrian government unless it abides by a U.N. cease-fire plan. 
  
 The U.N. estimates 9,000 people have been killed since the uprising began in March 2011. |||||
If you thought the details coming out of Houla couldn't get any worse, brace yourself: The UN today reported that more than 80% of the 108 dead were executed. Less than 20 were killed by artillery fire, according to a rep for the UN High Commissioner for Human Rights, who explained that the stats are based on research done by UN monitors that has been backed up by other sources, reports the AP. "Most of the victims were summarily executed in two separate incidents. At this point it looks like entire families were shot in their houses," he revealed. A number of countries getting tough in response to Friday's massacre: Australia today ordered two diplomats, including the most senior Syrian diplomat in the country, to leave within 72 hours, reports the AP. Francois Hollande announced that Syria's ambassador in Paris was also being booted from his country, and noted that the decision followed discussions with David Cameron and UN Secretary-General Ban Ki-moon, reports the AP. So it's no surprise that Britain is expelling three Syrian diplomats; Germany, Spain, and Canada have revealed they will do the same. A few hours later, the US joined in. Though Syria hasn't had an ambassador in the US since 2011, the State Department announced that the charge d'affaires at the Syrian Embassy has been given 72 hours to leave, reports the AP.