The Lethal Weapon actor is accused of verbally and physically attacking snapper Kristi Miller after she took pictures of the couple as they left a cinema in Sydney on Sunday (23Aug15).

Cops in the city have launched a probe into the incident and have contacted Gibson and Ross asking them to provide statements outlining their version of events, but Ross has refused, according to the Sydney Daily Telegraph.

Gibson has reportedly not responded to the police request, but a spokesman for the star has previously denied there was any physical contact with the photographer.