Midtown Gas and Grocery was robbed at knifepoint on South 13th Street around 1:11 p.m.
An employee told officers a man went into the convenience store and demanded cash at knifepoint. The man took some money and the employee's purse.
Witnesses say the man left the area in a white car.
He's described as African American, 5'6-5'9 with a thin build, wearing a blue denim coat and jeans.
Anyone with information should call 402 444-5818.
