Police hold grave fears for bikie associate who disappeared after dispute

Homicide detectives have raided a Melbourne Hells Angels bikie clubhouse in their search for a missing South Australian man.

The disappearance of an Adelaide man who travelled to Victoria with two bikies to work as a concreter is being treated as suspicious.

Homicide Squad detectives are appealing for information on Kerry Giakoumis, 29, and have raided a Hells Angels clubhouse in their search.Mr Giakoumis left for Melbourne on June 5 with two associates who police believe are members of the Hells Angels Outlaw Motorcycle Gang.

It's not known why he came to Victoria, however he had told family that he intended to work as a concreter, police say.

While in Melbourne, he regularly spoke with his family and his mother had booked a flight for June 10 for him to return home, but he didn't board the flight and never made contact with his family.

Mr Giakoumis' family reported him missing and his disappearance is being treated as suspicious.

The last known sighting of Mr Giakoumis is in the early hours of June 10 when it is believed he attended the Hells Angels clubhouse on Lipton Drive, Thomastown, with members and other associates.

His bank accounts and phone have not been active since then.

Detective Acting Senior Sergeant Jason Poulton from the Homicide Squad said police held grave fears for Mr Giakoumis' welfare.

"It's our understanding that Kerry wasn't a patched member and just an associate of the club at the time of his disappearance," he said.

"Investigators believe some kind of dispute has taken place and that may be connected to other members or associates of the Hells Angels OMCG."

There will be someone within the Hells Angels OMCG that knows and disagrees with what happened to Kerry and there is now an opportunity for that person to contact us directly or anonymously."

Police have released an image of Mr Giakoumis at a convenience store in South Australia that was captured on the day he left the state.It shows him wearing a distinctive Chicago Bulls sweatshirt, which he was known to wear while in Melbourne.

Homicide Squad, Echo Taskforce and Yarra Crime Investigation Unit officers searched three properties, including the clubhouse in Thomastown and residential properties in Richmond and Melbourne, on Thursday.