Brazil violence a 'warning', says Blatter

Argentine team Tigre refused to emerge for the second half against their Brazilian hosts, later alleging that armed police had barged into their dressing room, beaten the players with batons and threatened the goalkeeper with a gun.

"Such an incident I have to say is a warning for the organisers of the World Cup," Blatter told a news conference in Tokyo.

"It is a warning to all organisers (about) what can happen," he added, a day after the FIFA Executive Committee's final meeting of the year.

The South American Football Confederation (Conmebol) is investigating the claims by Tigre players of police brutality, which were denied by a Brazilian military police commander who said that some of his "unarmed" men were wounded.

The astonishing accounts came two weeks after the draw was held in Sao Paulo for June's 2013 Confederations Cup in Brazil, and only 18 months before the World Cup is due to kick off.

Blatter said football organisations could give guidelines on safety in stadia but that security "is definitely a matter for the police or the army".

"It is a pity if you cannot play the second half of a match for any reasons but it can happen in football," Blatter said.

"The game is touched by all the villainous in our society," he added.

"Football is not the origin of violence. The origin of violence is in our society. You can look back through the history of humanity and you will see there was violence before football."