Instructions: In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
Input: Media playback is unsupported on your device Media caption The BBC's Alex Capstick reported from the march as scuffles broke out around him 
  
 Clashes between rival Russian and Polish football fans in the Polish capital Warsaw have marred a Euro 2012 tie between the two teams. 
  
 A march ahead of the match by thousands of Russian fans to mark their national day had to be halted and some missiles were thrown. 
  
 Police say they arrested at least 120 people and that 10 people were injured. 
  
 A heavy police presence was in evidence around the stadium after the match as further clashes broke out. 
  
 About 6,000 police were on duty to keep the rival fans apart. 
  
 The match ended shortly after 22:30 local time (20:30 GMT) in a 1-1 draw. 
  
 Beforehand, some Polish fans on a bridge on the march route had tried to attack the Russian fans and had been involved in scuffles, says the BBC's Alex Capstick in Warsaw. 
  
 Tear gas, rubber bullets and water cannon were used to disperse fans at the end of the march, according to Poland's state news agency. 
  
 In a separate incident, 50 Polish fans in masks attacked Russian fans in a Warsaw cafe, the Russian news agency Interfax reported. 
  
 During the match, trouble broke out in an area of the city centre where the match was being displayed on big screens, the Associated Press reports. 
  
 Polish police fired rubber bullets and tear gas at a group of young fans who attacked them with glass bottles, according to AP. 
  
 Controversial history 
  
 More than just sporting rivals 1611-1612 - Polish army reaches Kremlin, occupying heart of Russian state 
  
 Late 1770s - Poland is partitioned, Russia begins over 130 years of rule 
  
 19th Century - Russia crushes Polish uprisings 
  
 Conflict with Russia continues after 1917 Bolshevik Revolution 
  
 1939 - USSR and Nazi Germany secretly agree on new partition of Poland 
  
 1940 - Soviet police kill some 22,000 Polish officers and other elite prisoners at Katyn 
  
 USSR turns Poland into a communist satellite state after World War II 
  
 1980s - Solidarity union in Poland plays a key role in defeating communism 
  
 2010 - Polish President Lech Kaczynski and 95 others die in Polish plane crash near Katyn, in Russia; Moscow's sympathy leads to warmer relations (Source: BBCRussian.com) Country profile: Poland 
  
 Russia annexed most of Poland in the 19th Century and ruled it for more than 100 years. The Soviet Union dominated it during the Cold War, after World War II. 
  
 The conservative Polish opposition condemned the march as a provocation, but it was approved by the authorities. 
  
 The Russian national holiday marks Russia's declaration of sovereignty in 1990 - a key episode in the demise of the Soviet Union. 
  
 Polish media highlighted fears that some Russian fans may sport Soviet flags and symbols - a highly sensitive issue for the many Poles who deplored communist rule. 
  
 "March or street war?" said a headline in the conservative Polish daily Rzeczpospolita. It quoted Wojciech Wisniewski, a member of the Polish Union of Football Fans, as saying "somebody really wants to make Polish football fans attack the Russians". 
  
 European football's governing body Uefa has opened disciplinary proceedings against Russia after a series of incidents involving the country's fans at Euro 2012. 
  
 Russian fans were caught on camera kicking and punching stewards inside the stadium at Wroclaw, in western Poland, after their team beat the Czech Republic 4-1 on Friday. Four stewards needed hospital treatment. 
  
 Anti-racist monitors at the match said a section of the crowd racially abused the Czech Republic's only black player, Theodor Gebre Selassie. 
  
 In a statement on Monday, Russian football association said: "We urge all football fans now in Poland to remember that they represent Russia. Please respect yourselves, your country and your team." ||||| At least 15 fans — Polish, Russians and Germans — were badly injured as fighting broke out in skirmishes around Warsaw in the hours leading up to kick-off, although the police were just about able to prevent the trouble from turning into a full-scale riot. 
  
 Water cannon, tear gas and rubber bullets were used to disperse a mob, while fireworks, bottles and other makeshift missiles were thrown by fans of both sides. 
  
 There were reports that during the game police fired rubber bullets and tear gas at a group of young Poles who attacked them with bottles in a fan zone in the city centre where thousands of people were watching the game on huge screens. 
  
 Police announced they had made at least 183 arrests, although there were fears that that number would grow as supporters dispersed across the city after the game. 
  
 In some of the worst scenes of football violence seen at a major tournament since England fans clashed with local youths in Marseilles at the 1998 World Cup, dozens of men were involved in running battles, punching and kicking each other. 
  
 More alarmingly, there were also unprovoked attacks on bystanders as they made their way to the stadium. 
  
 A statement released by Polish police said: "There are more than 183 hooligans caught by the police because of disorders in Warsaw – firstly during the march to National Stadion, secondly in the Fanzone in Plac Defilad Square. 
  
 "Among the kept persons there are fans of both teams – Russian and Polish. There are 10 persons, who are injured: 7 Polish, 2 Russians and 1 German – their lives are not in danger concerning the information from the medical services. 
  
 "The police operation is still lasting. The police officers are checking the surveillance system, police cameras and still (plan to) identify the hooligans who took part in the disorders. Further arrests are planned." 
  
 A Warsaw police spokesperson added: "We are still monitoring the situation and trying to identify the supporters involved. The operation is not over from our side as we continue in our attempts to catch those who are causing trouble." 
  
 The extent of the injuries was not immediately clear, although some eyewitness reports suggested at least one of those involved in a brawl between fans was in a serious condition. Police denied a report emanating from Russia that one fan had died as a result of his injuries. 
  
 The main source of the trouble was a march by Russian supporters from the city centre to the national stadium to mark Russia Day, with those at the front, most wearing hoodies, breaking ranks to confront Polish hooligans who had lined the route in order to launch an ambush. 
  
 One eye witness told The Daily Telegraph: “As the march came across the bridge, the Polish hooligans ran towards them. They had been waiting for them. 
  
 “It was very violent, with a lot of people involved, although the police managed to regain control pretty quickly. It was horrible to watch.” 
  
 Despite claims that only 15 supporters were injured, it is thought there were more who did not require the help of emergency services. 
  
 Tensions were running high all day as thousands of Russians descended on the city, while Polish hooligans urged each other to mobilise against them during a volatile build-up to the game after Russian fans had attacked stewards in Wroclaw last Friday. 
  
 Despite a huge police operation involving 6,000 officers, as well as support from Polish special forces, the vast security operation was unable to keep hooligans from both countries apart. 
  
 Dozens of men were involved in the running battles, although there were also unprovoked attacks witnessed where Russian fans draped in flags were punched as they made their way to the stadium. 
  
 Bystanders were also caught up in the violence, with Russians wading into groups of young Polish men with fists and feet. 
  
 Police estimated hundreds of fans from both countries had been involved but that their “sudden and decisive” reaction had prevented the trouble from escalating. 
  
 The march across the Poniatowski Bridge was organised to celebrate National Russia Day, which commemorates the fall of the Soviet Union in 1990, although it was bound to be provocative to Poles who endured decades of hardship under Soviet rule. 
  
 The march had been heavily criticised when it was announced. ‘March or street war?’ said a headline in the conservative Polish daily Rzeczpospolita. 
  
 Wojciech Wisniewski, a member of the Polish Union of Football Fans, added: “Somebody really wants to make Polish football fans attack the Russians.” 
  
 There were also outbreaks of pre-planned violence across the city on Tuesday morning. The worst appears to have been an attack by a group of 50 Polish supporters on a café in which Russian fans were gathered. 
  
 Polish Premier Donald Tusk had urged his countrymen not to react to the provocation and show “maximum cordiality” before the game. Although many fans mixed happily inside and outside of the stadium, a hard core of troublemakers will ensure there are plenty of difficult questions for Uefa to answer. 
  
 European football’s governing body has been criticised for allowing the game between the two nations to take place on Russia Day because of the special tension it would cause. |||||
Output:
Euro 2012 has been shaken by some of the worst violence to hit a major soccer tournament in years. At least 120 people were arrested as large groups of Polish and Russian fans clashed in Warsaw before and after the two national sides played to a 1-1 tie, reports the BBC. At least 15 people were injured as fans brawled and police fired rubber bullets and tear gas to prevent the skirmishes from becoming a full-scale riot. Despite the long history of bad blood between the two countries, authorities allowed thousands of Russian fans to march through the city to mark Russia's June 12 national day. Thousands of police officers were deployed to keep rival groups of fans apart, but they were unable to prevent them from attacking each other, reports the Telegraph. In a separate incident, a group of 50 Polish fans attacked a cafe where Russian fans were gathered. There were also reports of unprovoked attacks on bystanders.