Michael Dye murder: Wembley fans' CCTV image issued
Police have released CCTV images of football fans who may have information about the murder of a Wales' supporter at Wembley.
Bluebirds fan Michael Dye, 44, suffered head injuries before the Euro 2012 qualifier on Tuesday and died later in hospital.
Police want to talk to fans who were at Turnstile C before the game.
Players and fans will hold a minute's silence before Saturday's Cardiff City home game with Doncaster.
Police say the post-mortem examination gave the cause of Mr Dye's death as blunt trauma to the back of the head.
No further action is being taken against six men who were arrested in the Wales supporters area of Wembley after the incident.
Officers from Metropolitan Police's Homicide and Serious Crime Command are investigating, and issued the CCTV image of fans at the stadium as part of the inquiry.
Acting Det Ch Insp Sheila Stewart appealed to anyone who recognises any of the witnesses in the CCTV still released to come forward.
"This incident has emerged from a moment of brutal violence with catastrophic consequences leaving behind a family without a son, husband and father," she said.
"It is imperative that we have the public's assistance to identify those involved,"
Both teams will wear black arm fans in the Cardiff City - Doncaster match later where the family of Mr Dye, will attend as guests of the club.
Wales manager Gary Speed will join both managers at the side of the pitch for the minute's silence.
On Friday afternoon, Bluebirds and Wales striker Robert Earnshaw, representing both Cardiff City and the Football Association of Wales, lay flowers at the gates.
The club said the Ninian Park gates, where many fans have left tributes, will remain closed for Saturday's game as a mark of respect.
Long-time friend Vince Alm, of Cardiff City Supporters' Club, said Mr Dye's partner Natalie and family had taken strength from the depth of feeling from fellow fans.
"There's been tributes from people who don't know him or knew him little but, because of the tragedy of it, they've wanted to show their support and grieve alongside the family," he said.
"Natalie's had sympathy cards from all sorts of people including one from the House of Commons.
"His boys have also been down there at the gates to look at the tributes. They take strength from that."
Fans are also organising a bucket collection on Saturday with cash raised being donated to the family.