Four police officers were arrested by officers of the Professional Standards Bureau on Sunday night.
Senior officers yesterday confirmed the officers who are assigned to the Morvant Police Station were in police custody.
Up to late yesterday, the lawmen were being questioned by their colleagues in connection with a robbery at the apartment of three Chinese nationals at their home at Orchard Drive, Edinburgh Gardens, Chaguanas, last December.
The victims were allegedly robbed of $12,000.
CCTV cameras reportedly captured that lawmen using a marked police vehicle to rob the victims around midnight.
The investigations, which was conducted by the Professional Standards Bureau, is now under inquiry by investigator acting inspector Jackman.