The incident occurred at 4:16 a.m. at XXX Theater/Store in the 12700 block of Lake City Way.
Police said a man walked up to the clerk, pulled out a gun and demanded money. The man made off with an unspecified amount of cash.
No one was injured in the incident. A party was taking place one floor below, but no one at the party was aware of the armed robbery at the time.
No detailed description of the robber was available.
Anyone with information on the case is urged to call police immediately. Anonymous tips are welcome.