LANDOVER, Md. (AP) — Police say a postal worker has been shot and killed in Prince George’s County while he was on duty.

Police say officers were called to Reed Street in Landover on Saturday evening and found a man suffering from apparent gunshot wounds. He was pronounced dead at the scene. On Sunday, police identified the victim as 26-year-old Tyson Jerome Barnette of Upper Marlboro.

Investigators say Barnette was a U.S. Postal Service employee who was on duty at the time. Police are trying to identify suspects and a motive in the case.

The U.S. Postal Inspection Service has announced a $100,000 reward for information that leads to an arrest.

The National Association of Letter Carriers says the incident shows the need for safety considerations in how and when mail is delivered.