DETROIT (WWJ/AP)- Two Detroit police officers are suspended, accused of partying at an illegal after-hours club while on duty and tipping off patrons about an impending raid.

The club, near Southfield and Joy Roads, was being staked out late this March when Officers Henry Jackson and Jamil Martin, who were not part of the operation, went inside.

Authorities said the officers and most of the patrons left by the time the club was raided. In all, three people were arrested and 18 were ticketed.

The Wayne County Sheriff’s Department said in a statement it believes as investigators were finalizing details of a warrant for the raid, patrons inside the establishment were tipped off as to the pending operation and left the premises before the raid took place.

Police believe Jackson and Martin warned patrons via text messages about the raid. They both have been suspended with pay as an investigation into the incident continues.

The Associated Press contributed to this report.