Authorities are offering a $25,000 reward for information about a suspect who wielded a gun and an umbrella in a robbery at a Chester post office.

The U.S. Postal Inspection Service on Wednesday announced the reward and distributed surveillance images of the man walking on the street near the post office.

The robbery happened shortly after 12:45 p.m. on Nov. 30 at the Chester post office at 400 Edgmont Ave., the service said.

The robber, carrying a firearm in one hand and open umbrella in the other, approached a clerk and demanded cash.

No injuries were reported.

The suspect was described as a bald black man about 5 feet 8 inches tall. He was wearing an olive green sweatshirt, blue jeans, and black work boots. The suspect was armed with a handgun and carrying a large blue and white golf-style umbrella, officials said.

Anyone with information can call the U.S. Postal Inspection Service at 1-877-876-2455 or send an email to PhiladelphiaTips@uspis.gov. The reward is for tips that lead to an arrest and conviction.