Sydney ? Police defended security levels at Australia’s largest airport today after a man was beaten to death during a brawl by suspected rival biker gangs in one of Sydney’s busiest terminals.

Four men were charged with affray — fighting in a public place — for the violence that occurred as terrified passengers watched on Sunday. They could face two years in prison.

State authorities held an urgent meeting today to consider introducing tougher laws against biker gangs, amid fears of an escalating gang war that has included drive-by shootings and a blast outside a fortified Hells Angel’s clubhouse. Sunday’s death was the first casualty from the suspected gang-related clashes.

The fight erupted in one of Sydney airport’s two domestic terminals when a group of suspected gang members was ambushed by another group from a rival gang as they disembarked from a flight.