TULSA, Oklahoma - Tulsa Police are investigating an armed robbery at the QuikTrip at 11th and Sheridan Sunday morning around 5:40 a.m. 

Police said a man pulled out a silver semi-automatic handgun and demanded money from the QT employee, but it's not known how much money he got away with.

The suspect ran out of the store and got into a white Chevrolet or GMC single-cab pickup that was waiting for him a short distance away. Witnesses said the suspect vehicle then drove north away from the store. 

Police said no shots were fired and no one was injured in the robbery.