A postal worker has been shot while on his mail route in Alabama, authorities said.

The carrier was shot around 2 p.m. Wednesday in Tarrant, a suburb of Birmingham, Al.com reported.

The mailman had just hand-delivered mail to a resident and had walked back to his truck when the gunfire happened, police and witnesses told the news site.

A car pulled up and someone opened fire, shattering the window of his United States Postal Service truck, witnesses said. Resident Darnella Austin tells Al.com that she heard four gunshots.

The wounded carrier got out of his truck and ran to nearby homes in an attempt to get help, police said. He was taken to UAB Hospital with injuries that are not believed to be life-threatening.

The U.S.P.S. offers a standing reward of up to $50,000 for information that leads to the arrest and conviction of people responsible for attacks against its employees, Birmingham Postal Inspector Tony Robinson said.