Detectives have charged three more people over an incident in Cooloongup that saw a man allegedly kidnapped and bashed after shots were fired.
Police will allege four people attended a home on Toora Place on February 15 and confronted the male resident.
The resident attempted to run from the home, before a number of shots were allegedly fired and the man was forced into the boot of a Mitsubishi Magna.
He was then allegedly driven to an isolated area in Hopeland and bashed.
The Magna was later found dumped on Surf Drive in Secret Harbour.
As part of the ongoing investigation Major Fraud Squad and Gang Crime Squad detectives searched a home on Kingscliffe Drive in Golden Bay on Wednesday.
Two 24-year-old men from Golden Bay were arrested and a firearm was seized.
One of the men was charged with detaining another with intent to gain a benefit, assault occasioning bodily harm and going armed in public to cause fear.
The second man has been charged with detaining another with intent to gain a benefit and assault occasioning bodily harm.
Both men were refused bail and appeared in the Rockingham Magistrates Court yesterday.
They will both appear in the same court again on March 24.
On Thursday police also arrested a 21-year-old Bunbury woman.
She has been charged with detaining another with intent to gain a benefit and assault occasioning bodily harm.
She was refused bail and is due to appear in the Bunbury Magistrates Court today.
A 38-year-old man who was charged in February over the incident is next due to appear in the Rockingham Magistrates Court today.