A gunman who seriously wounded two members of the Bros outlaw motorcycle gang outside its Yarraville clubhouse remains on the run, but detectives from the armed crime squad and Echo taskforce have obtained video footage of the attack last month.

Closed-circuit television cameras captured the shooter sprinting up Campbell Street in an industrial precinct of Yarraville, after alighting from a dark-coloured car in nearby Kent Street.

Dressed in a grey hoodie, the man stops outside the clubhouse, assumes a shooter's stance and blasts off several rounds from a handgun. According to an audio recording, seven shots are fired in total.

More than 50 gang members and associates had attended a function on the night, with several congregating outside.