DALLAS -- Police are searching for a man they say shot four people, including a security guard, while trying to rob a grocery store in Dallas.

The suspect is on the run after trying to rob employees of the Minyard Food Store at Singleton and Hampton Thursday at gunpoint.

An armed security guard, a store manager and another witness were outside the store at about 10 p.m. getting money out of gas pumps when the suspect drove into the parking lot, police said. He ambushed the workers and demanded cash.

The victims ran away, but the suspect chased them through the parking lot.

The armed security guard and the suspect exchanged fire and the suspect took off. The security guard was shot twice. A female witness was shot once, and a male witness was shot once, police said. The store's manager was grazed by a bullet.

The female victim's daughter tells News 8 that her mom was leaving the store after buying a dog collar when she was in the wrong place at the wrong time.

All victims were taken to a local hospital and are expected to survive.

"It's just something ugly to happen here for us because West Dallas is so much better. So much good. It's just unreal. It's just unreal that it happened here in our grocery store," shopper Marilyn Daniels said.