The Met Police are investigating after footage emerged of a Millwall fan punching a Tottenham supporter in the face following Sunday's FA Cup tie at White Hart Lane.
The seven-second video clip, which was widely circulated on social media, shows two Tottenham fans singing 'we f***ing hate Millwall' following their 6-0 quarter-final win to rival fans walking past.
One Millwall fan then emerges from the group and hits one of the pair hard in the face, sending him tumbling to the ground, to cheers from those going past.
The short video started with two Tottenham fans (right) goading passing Millwall supporters after Sunday's FA Cup quarter-final tie at White Hart LaneA group of the Millwall fans closes in to confront the two singing Spurs supporters - the fan in the black coat can be seen ready to throw the punchThe Millwall fan in the black coat (left) punches one of the Spurs supporters in the faceThe struck fan tumbles backwards onto the pavement, dragging his friend with himThe Millwall fan stares at his victim as the Spurs fan, bottle in hand, lands on the floorThe video ends with the Spurs supporter checking on his injured friend
Met Police 'confirmed that the video circulating on social media has been reported to police'.