OREGON CITY, Ore. (AP) — A Clackamas County sheriff's supervisor was placed on paid leave amid allegations that male deputies staged a nude photoshoot at the courthouse for a calendar they gave to a retiring colleague.

The Oregonian/OregonLive reports that the sheriff's office will launch an internal investigation. The allegations were contained in an anonymous letter sent to Sheriff Craig Roberts and The Oregonian/OregonLive.

The letter said the calendar contains photos that include nude deputies with objects hiding their genitals, including a gun belt and a firefighter's hat.

“I take this complaint very seriously and can assure the public that we will investigate this quickly and thoroughly," said Clackamas County Sheriff Craig Roberts. "If we find that employees have violated any law or policy they will be held accountable.Behavior like this, if true, is not acceptable and extremely troubling."

Agency spokesman Ben Frazier says Capt. Dave O'Shaughnessy is on leave. He's a 24-year veteran with the Sheriff's Office who heads the civil division.

Dave O'Shaughnessy