(WBIR) Knoxville police said a robber allowed customers to pass him in line before stealing money from a north Knoxville Walgreens late Sunday night.

Employees told officers a very thin, unshaven man in his 20s came into the store and demanded money from the cashier shortly after 11:15 p.m. Police said the robber also indicated he had a handgun in his jacket pocket.

When unaware customers approached the register, the suspect calmly stepped aside and allowed them to get in front of him. When the customers left, the man came closer towards the counter and demanded money again. After the employee put cash on the counter, the robber grabbed the money quickly ran out of the store.

Police searched the area, but were unable to find the suspect. They did, however, find his clothing in an alley near the 900 block of Banks Avenue.

Witnesses said the man is about six feet tall and has dark hair. He was wearing a knit cap that looked like a mouse, with ears sewn on the top and a small face on the front.

If you have any information, you're asked to contact the Knoxville Police Department at 865-215-7212.