Video has emerged of in the street before a Premier League game in east London.
Supporters clashed ahead of Saturday's match between and Sunderland, which was won by the Irons thanks to Diafra Sakho's strike.
The footage shows punches being thrown, while bystanders look on with concern.
One of the men involved even uses a hard hat as a weapon in the altercation.
The fracas is then broken up by two policemen, who also appear to come in for shoves and pushes from the fans.
The game – a late kick-off at Upton Park – appeared to be petering out into a goalless draw, with neither side able to carve out clear-cut openings for much of the match.
But some late pressure from Sam Allardyce's side paid off when Sakho guided a low volley past Costel Pantilimon.
The result lifted the Irons to ninth in the table and left new Sunderand boss Dick Advocaat with plenty to ponder over the international break.
Supporters clashed ahead of Saturday's match between and Sunderland, which was won by the Irons thanks to Diafra Sakho's strike.
The footage shows punches being thrown, while bystanders look on with concern.
One of the men involved even uses a hard hat as a weapon in the altercation.
The fracas is then broken up by two policemen, who also appear to come in for shoves and pushes from the fans.
The game – a late kick-off at Upton Park – appeared to be petering out into a goalless draw, with neither side able to carve out clear-cut openings for much of the match.
But some late pressure from Sam Allardyce's side paid off when Sakho guided a low volley past Costel Pantilimon.
The result lifted the Irons to ninth in the table and left new Sunderand boss Dick Advocaat with plenty to ponder over the international break.