Mandurah Detectives have charged a fourth person as a result of their investigation into an alleged home invasion in Halls Head on August 8.
It is alleged the man was one of several people who entered an apartment on Apollo Place about 3.50am.
Once inside, they assaulted the two occupants and stole various items before departing.
The occupants, a 23-year-old woman received minor injuries and a 24-year-old man was taken to Peel Health Campus for treatment to a laceration to his head and an arm injury.
A 35-year-old Madora Bay man has been charged with aggravated burglary and commit, aggravated armed robbery, possessing a prohibited drug and possessing drug paraphernalia.
He is due to appear in the Perth Magistrates Court on September 9.