Three adults and a teenager were watching go kart races when they say they ‘‘heard a bang and then the whistle of a shot passing over their heads’’ from a nearby gun club, police said on Tuesday.

Police closed the Melbourne International Shooting Club in Port Melbourne following ‘‘several reports of gunshots’’ in the area around midday on Monday.

A sign on the front gate of the Melbourne International Shooting Club on Tuesday. Credit:Jason South

At the time of the incident, the four witnesses at the Melbourne International Karting Complex on Todd Road were about 150 metres away from the spot where three shooters were active on the range.

Police said no one was injured and no bullets or fragments have been found.