There are dangerous signs a Melbourne bikie war is escalating after two Bandidos outlaw motorcycle club members were shot in the chest, during a drive-by attack.
It is believed a rival gang carried out last night's shoot-out and there are fears innocent people could soon be caught up in the feud.
The Bandidos convoy was heading south along the Bolte Bridge around 8.30am, when a station wagon sped up alongside them and a gunman fired multiple shots.
The station wagon sped off as the convoy tried to give chase.
One rider, a 40-year-old Sunbury man, was hit was hit in the chest, causing him to fall off his bike and slide into a barrier.
He was taken to hospital and remains in a stable condition, suffering a number of broken bones as well as the gunshot wound to his chest.
A second rider also attended hospital later in the evening with suspected gunshot wounds.
The vehicle believed to be used in the shooting was found burnt out in Keysbourgh, south of the city, just a few hours later.
Police say it is possible the parties are known to each other and this was a targeted attack.
Victoria Police's anti-bikie Echo taskforce detectives are ramping up their patrols around enemy club houses, in fear of revenge attacks.
Investigators are calling on anyone who may have dashcam footage of the incident or was in the area to come forward.
Anyone with information is encouraged to call Crime Stoppers 1800 333 000 or use the Crime Stoppers online reporting page.