Whittlesea Crime Investigation Unit detectives have released CCTV and are hoping to identify a man after shots were fired in Lalor on 10 June.
Police have been told an unknown man armed with a firearm walked to an address on Gardenia Road just before 1am.
It is believed he fired a number of shots at the front of a house before fleeing the scene and was last seen running west on Rosedale Road.
Occupants of the house were home at the time but no one was injured.
The offender is described as Caucasian, 180cm tall and was wearing a blue hooded jumper and dark pants.
Anyone who witnessed the incident or anyone with information is urged to contact Crime Stoppers on 1800 333 or submit a confidential crime report at www.crimestoppers.com.au.