Officers responded after an employee called 911 regarding an armed robbery at the O'Reilly Auto Parts on Central Texas Expressway, near W.S. Young Drive. When police arrived, the gunman held a up gun to another employee. The employee was able to get out unharmed about an hour later.

When SWAT entered the store the gunman had already fled the scene.

Crime Stoppers is offering a $1,000 reward for information leading to an arrest. There are three ways to leave an anonymous tip:

• Call (254) 526-TIPS
• Text “KILLEEN” along with your tips to CRIMES
• Leave a tip online at Killeencrimestoppers.com