Police have arrested six men in connection with a brawl between rival fans of Championship football clubs last month.
Violence broke out between Brighton and Hove Albion supporters and Crystal Palace fans in London after the two clubs were involved in separate fixtures on November 10.
Officers from the Metropolitan Police Service's Public Order Investigations Team, working closely with colleagues in Kent, Surrey and Sussex Police, carried out the arrests at about 5am today.
Four of the men - aged 21, 23, 32 and 41 - were arrested in Sussex, while a 19-year-old and a 25-year-old were arrested in south London, police confirmed. They are currently being held at a south London police station on suspicion of violent disorder.
The investigation was launched after violence broke out in the King's Cross area, the Seasiders having drawn 3-3 at Wolverhampton Wanderers and the Eagles securing a late 2-1 victory at Peterborough United.
Detective Chief Inspector Andy Barnes said: "We (the police forces involved in the investigation) share a firm commitment to tackle and eradicate football hooliganism and will seek football banning orders where appropriate.
"Our investigation continues, and I would urge anyone who has any information about individuals who use football as a cover to commit violence and disorder to contact police."
The arrests come on the day the rival clubs are due to meet each other in the league, at Palace's Selhurst Park.
Police enforced crowd control measures when the two played each other in Croydon in January, including holding some fans in the ground after the final whistle to ease the risk of confrontation between rival supporters.
The host club said there was no plan to repeat the exercise at today's match, but said some fans would not be able to use some roads to leave the stadium.
Going into today's fixtures, Crystal Palace were one point behind leaders Cardiff City in second, while Brighton were in seventh, one point off the play-off places.
