A young woman who escaped from a car where she was allegedly being held against her will ultimately led police to an elaborate home-made bomb set up at a Perth house.
The 21-year-old woman contacted police on Sunday night, claiming she had been forced to stay in a car by her 36-year-old partner.
Police obtained a search warrant for a Casuarina house on Monday, and the bomb response unit were called in to ensure there were no dangers before officers entered the property.
Detective sergeant Andrew Broadley said the improvised explosive device was disguised as a hanging fly trap, and was linked to a surveillance camera inside the house so the residents could see who was coming and set the device off at a moment's notice.
The policeman said he had never seen anything like it.
Several firearms, ammunition, drugs and drug paraphernalia were found at the property and two people were charged.
The trail led police to a Parmelia property on Wednesday, where more drugs, cash, knuckle dusters and drug paraphernalia were found, and two people were arrested at the house.
The 36-year-old man was charged with deprivation of liberty and police say further charges are pending.
He appeared before Rockingham Magistrates Court on Thursday.