Matt Campbell.

Matt Campbell. Photo: Getty Images

North Melbourne forward Matthew Campbell is under police investigation and his club is deciding how to sanction him after he was thrown out of a casino and allegedly damaged a car.

Campbell, who had been drinking, was asked to leave Melbourne's Crown Casino about 1am yesterday, the Kangaroos said in a statement.

After refusing to leave, Campbell had to be removed by security. He then allegedly damaged a parked car belonging to a casino staff member.

''We know Matt was drinking prior to the incident and we are bitterly disappointed with his behaviour,'' the club's interim chief executive Cam Vale said.