This evening's FA Cup semi-final at Wembley between Millwall and Wigan Athletic was marred by violent scenes involving supporters of the London club.
Shortly after the second half had got underway, broadcaster ESPN showed footage of some Millwall fans seemingly fighting among themselves, before turning on the police officers who were attempting to quell the scenes.
The trouble, which left numerous young children at the stadium in tears, carried on for the majority of the half. One supporter was even caught on camera hiding a police officer's hat inside his jacket.
According to Sky Sports News, 10 supporters have been arrested so far, with more anticipated.
After the match, which the Lions lost 2-0, manager Kenny Jackett said that he would not comment on the incidents until he had seen them for himself.