Three men who were arrested in connection with crowd disturbances at Saturday's Premier League game between West Ham and Middlesbrough have been bailed.
Two were arrested on suspicion of affray and the third on suspicion of assaulting a police officer.
Supporters were seen confronting each other inside West Ham's new London Stadium and fighting outside, while footage of violence appeared on social media on Saturday evening.
Police said no injuries were reported either before or during the 1-1 draw and said there had been "a small minority intent on causing disruption."
A Metropolitan Police statement, released on Sunday, said: "Three men have been bailed pending further enquiries following their arrests in connection with a disturbance outside the ground following the West Ham and Middlesbrough match on Saturday 1 October."
The three men are aged 26, 49 and 47, with Saturday's incidents coming after 10 fans were ejected during last month's 4-2 home defeat by Watford amid reports of fights breaking out in some areas of the ground.
But in a statement released on Saturday, West Ham said: "We must stress that the vast majority of the more than 400,000 supporters who have attended a game at the stadium since August have behaved impeccably, and we will not let the acts of mindless individuals tarnish their reputation."
Dimitri Payet's stunning goal secured a 1-1 draw for the Hammers against Middlesbrough after four straight defeats, but the club's move from Upton Park to the former Olympic Stadium is still not sitting well with some fans.
During the game, a section of the home supporters sang: "We should have stayed at the Boleyn [Upton Park]."