Police are hunting an "unpredictable and possibly dangerous" man wanted for questioning over a number of offences believed to have happened in Perth's eastern suburbs last month.

Midland detectives believe Michael Luke Alan Kobiolke, 29, can help their investigation into incidents that occurred in Bellevue and Belmont in November, including robbery, deprivation of liberty and firearm offences.

Michael Luke Alan Kobiolke. Credit:WA Police

"Mr Kobiolke is considered dangerous as he may be in possession of a firearm and may behave in an unpredictable manner," WA police spokeswoman Susan Usher said.

Mr Kobiolke is described as fair-skinned with a ruddy complexion, about 180cm tall, with a slim build, medium-length brown hair, brown eyes and possible facial hair.

If sighted, members of the public are advised not to approach him but to call police immediately on 131 444.