The man pointed the object at the employee and demanded money; the employee responded that he didn't have any, police said.
The man then ran up the stairs and out the back entrance, police said. Another employee told police he was across the street when he saw a man standing by the door. He told police another man ran out of the restaurant with an object in a white shopping bag, pulled a mask over his face, and ran down Sansom Street. The other man fled down 11th Street, police said.
Nothing was stolen and no one was hurt, police said.
Employees inside the Midtown Diner described the pair who entered the building as black males. The employee on the street corner described the man he saw standing by the door as a black male in his early 20s, wearing a gray-and-white baseball shirt and cut-off jeans. The employee described the man he saw fleeing the restaurant as a short man with a light complexion, wearing a black shirt.
Contact Aubrey Whelan at 610-313-8112, firstname.lastname@example.org, or follow on Twitter @aubreyjwhelan.