This happened just before 10:30 a.m. Wednesday off of Loop 494.
The Montgomery County Sheriff's Office says the man got a gun from his car and shot at the workers.
The employees fired back, shooting at him three times. No one at the business was hurt.
The suspect, who is described as a Hispanic man, was wearing a white shirt.
He left the scene in a white Chevrolet Caprice. Authorities say his vehicle has multiple bullet holes in the driver's side door and windshield.
He was last seen going northbound on Loop 494. He's the only person in the car.
Update 11:00 am- Vehicle has multiple bullet holes in the driver side door and windshield. Last seen northbound on Loop 494. Vehicle was occupied by only the actor. No injuries on scene. School lockdowns have been lifted. https://t.co/b9dS8vSHZI— MCTXSheriff (@MCTXSheriff) August 22, 2018
There's no word yet why the suspect started shooting.
Several New Caney ISD campuses sheltered in place as a precaution. The district says that shelter in place has since been lifted.