Detectives from Maribyrnong Crime Investigation Unit are appealing for public assistance following a firearms incident in West Footscray.

Investigators have been told a man and woman drove into the underground car park of an apartment complex on Roberts Rd about 8.50pm on May 16.

A man who was on foot followed the vehicle into the car park, allegedly produced a handgun and threatened the occupants of the car.

The driver managed to turn the station wagon around and sped out of the car park, smashing through a gate as he exited.

The man ran after the car but was not successful in catching it.

The offender is perceived to be Caucasian in appearance, in his late 40s with brown/grey hair.

At the time of the offence he was wearing a red hooded top, blue jeans and blue runners.

The victims, a 27-year-old man from West Footscray, and a 24-year-old woman from West Footscray, were not injured in the incident.

Detectives have released CCTV footage and images of a man that they believe may be able to assist with their enquiries.