UPDATE: A SHOOTING victim blasted in the groin remains on life support as police try to track his movements in the past 48 hours.

Investigators say they have no clear motive for why Brunswick man Sean Edward Walker, 27, was shot then dumped at the Western Hospital in Sunshine.

A man and a woman pulled up at the hospital at 10.30pm yesterday in a light-coloured Mitsubishi Vereda and dropped Mr Edwards outside.

The vehicle has a sunroof and spoiler at the back.

Det-Insp John Potter of the homicide squad said investigators needed to find the couple who dropped off Mr Edwards at hospital.

He said it was not known where Mr Edwards had been shot and there was no clear motive.

“We need to work out Sean’s movements in the past 48 hours,” he said. “We can’t rule anything out at this early stage.”

Mr Edwards has been transferred to the Royal Melbourne Hospital where he remains under police guard.

He underwent surgery for the gunshot wound.

The homicide squad is probing the incident and are keeping Mr Walker under police guard in hospital.

Det-Insp Potter said police were trying to piece together the events prior to the shooting and have released a photo of Mr Walker.

“We are interested in speaking to anyone that knows Sean’s movements during the past 48 hours,” he said.

“He arrived at the hospital unconscious and hasn’t been able to provide any information to police.

“We need to know what happened to Sean and urge anyone with any information to contact police.

“We also ask the man and woman who dropped Sean off at the hospital to come forward and speak to police.”

Police are appeal for assistance in locating the car.

Anyone with information should contact Crime Stoppers on 1800 333 000.

Originally published as Mystery surrounds man shot in groin