A football fan was beaten to death outside Wembley stadium before Tuesday's match between England and Wales. 44-year-old Michael Dye, from Cardiff, was found with head injuries on a concourse outside turnstiles at the ground.
Paramedics have said he also suffered a heart attack before being taken to Northwick Park hospital, in north London. He was pronounced dead at 8.50pm.
Six men, all believed to be Wales supporters, were being questioned by police about the incident.
Aged from their late 20s to early 40s, all six were all arrested inside the ground in the Welsh supporters' area.
Police were called after reports of an alleged assault at about 7.20pm.