The Harker Heights Fire Marshall is investigating the cause of a fire that occurred Wednesday evening at a water treatment facility in the 4000 block of Lakecliffe Drive.

The fire was reported shortly before 7:30 p.m. When fire crews from Harker Heights and Killeen responded, they found a shed at the facility in flames. It took firefighters roughly 15 minutes to get the fire under control and water services were not interrupted.