A University of Michigan police officer remains on unpaid leave after being arrested this month for possession of cocaine, authorities said.

The officer was placed on leave Jan. 14, pending the outcome of an internal investigation, campus police spokeswoman Diane Brown said.

The officer's name has not been released.

No charges have been filed at this point, said Michigan State police Lt. Monica Yesh, who heads the Livingston and Washtenaw Narcotics Enforcement Team (LAWNET).

LAWNET and Ypsilanti police made the arrest, Yesh said.

Yesh did not release any other details, saying it is an ongoing investigation.