Three football fans were arrested outside the London Stadium on Saturday as West Ham supporters' unrust threatened to boil over.
Dimitri Payet's stunning goal secured a 1-1 draw for the Hammers against Middlesbrough after four straight defeats, but there were disturbing scenes after the match as rival fans clashed outside the stadium.
Two men were arrested on suspicion of affray, and a third was held on suspicion of assaulting an officer, the Metropolitan Police said.
Stewards confirmed that police had to separate home and away supporters after clashes on the loop road through the Olympic Park.