Police are investigating an overnight robbery at an adult bookstore.

Police say a man entered First Amendment at Fillmore on E. Fillmore St. around 1:00 a.m. Sunday with a gun and demanded money from the register. The suspect left with an undisclosed about of cash.

Officers searched the area for the suspect but did not find him.

If you have any information on this case, call Colorado Springs Police at (719) 444-7000.