Police have warned the public not to approach two men wanted in connection to a serious assault south of Perth on Friday.

Police would like to speak to Matthew John Parker, 26 and Christopher Anthony Parker, 22, who they believe can provide information about the Mandurah incident.

Matthew Parker is between 175 to 180cm tall with a solid build, fair skin, short blonde hair and blue eyes and a solid build.

Christopher Parker is about 180cm tall with a slim build, fair skin, shoulder length blonde hair that may have been dyed black, blue eyes and two piercings in his bottom lip.

Police warned the men were unpredictable, and members of the public should not approach them.

If any of the men are sighted, police should be contacted immediately on 131 444.

A third man wanted over the same incident was taken into custody on Tuesday.

Police are also still hunting a man wanted over a suspected shooting in Beldon last week.

Dean Anthony Bertasso, 29, is wanted by police after a 50-year-old man was allegedly shot in the chest on Lockeville Close just before 8am.

The man suffered a non life-threatening injury and was taken to Royal Perth Hospital.

A warning regarding Mr Bertasso was issued on Friday, with police warning the public not to approach him if they see him.

“He may have access to a firearm and if sighted, police should be contacted immediately on 131 444,” WA Police spokeswoman Susan Usher said.