FOUR would-be ghost hunters were busted by security officers at the old Swanbourne Hospital on Saturday night.
Police said two men (28 and 20) and two women (20 and 22) had brought an electro-magnetic field device - bought from a ghost hunting equipment website - to the Mt Claremont building, which is said to be haunted.
The four were seen by patrol staff carrying torches in the disused building.
They will be summonsed to appear at Perth Magistrates Court in September.