A man and a woman have been arrested for investigation of robbing the Buckingham Plaza Post Office in Aurora after one of them allegedly bound postal workers with zip ties Thursday afternoon and robbed cash registers, federal court records say.

Joseph Deshawn Wheeler and Philisha Gail Wheeler have been arrested for investigation of assault and robbery involving U.S. mail, according to U.S. District Court of Denver documents. They could face up to 25 years in prison, according to court records.

A man wearing all black clothing, including a hoodie, gloves and a balaclava, entered the post office at 1074 S. Ironton St. at 3:54 p.m. The only skin an employee could see was around the suspect’s eyes, an arrest warrant affidavit says.

The man walked to the counter line, pointed a black semi-automatic hand gun at two clerks, identified only as S.L. and K.H., and told them to get on the ground. The suspect then threw zip ties at the clerks and ordered them to put them on, the document says.

The suspect took bills from two cash registers and stuffed the money into a gray draw-string bag. The suspect walked the clerks into a workroom and had them lay prone on the floor. S.L. told the robber that the safe was open but empty, the affidavit says.

When the suspect fled, one of the clerks called police, according to the affidavit.

Aurora police officers and postal inspectors responded to the 911 call. They watched surveillance video from the Weinerschnitzel/Hamburger restaurant about three blocks away on Havana Street, the affidavit says.

They saw the suspect climb into a dark brown Ford Escape parked in the restaurant’s parking lot. The license plate on the car was registered to a pickup truck, the affidavit says.

Postal inspectors and Aurora police arrested the Wheelers after they drove away from their home later Thursday night.