Police responded to a Chinese restaurant in the 100 block of East Tabor Avenue shortly before 5 p.m. after receiving a call from an employee reporting that they had been robbed.
A man received a meal at the restaurant and refused to pay for it. The man then pulled out a black semi-automatic handgun, pointed it at an employee, and demanded cash, according to police.
The employee refused to give him cash and the suspect ran away. He was last seen running northbound over a cement wall and onto a bike path, police said.
The suspect was described as a black man around 20 years old, about 5 feet 8 inches tall, with a slender build and a short afro.
He was wearing black pants, a white T-shirt and a black hooded sweatshirt, and was armed with a black handgun.
Anyone with information about the robbery is asked to call police at (707) 428-7300.