Oklahoma City Police say two armed robbers are on the run Saturday after holding up Advance Auto Parts near N.W. 32nd  and May Avenue.

Officers say two men walked into the store just after 10:30 a.m. One of the suspects stayed by the door while the other held up a store worker. That suspect then pistol-whipped the employee. The blow to the clerk's caused the gun to fire. 

Police say the suspects took off running when the shot was fired.