ONTARIO (CBSLA.com) — Police are on the hunt for a woman they say pepper sprayed customers and employees inside a fast-food restaurant in Ontario.

A drive-thru customer allegedly upset about her burrito order is accused of walking into the Del Taco located on Mountain Avenue and G Street and going on the attack.

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Rose Keith wore sunglasses during her interview with CBS2/KCAL9 because she says her eyes were on still on fire hours after being sprayed in the eyes.

“It was horrifying. It was terrible,” she said. “She sprayed my face and I turned around and I couldn’t see afterwards.”

Keith says she noticed the pepper spray suspect making a scene about her burrito and throwing a basket of condiments at employees.

“She threw it at them. She was upset. The manager came out and said, ‘You can’t be doing that. You need to leave.’ The lady had a pen and she threw at her,” Keith said.

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Del Taco is working with police and would not release any surveillance video.

Employees weren’t allowed to say much about what happened.

A repeat Del Taco customer who wasn’t at the restaurant when the alleged attack occurred says the employees at the location are very kind when taking orders at the drive-thru.

“They don’t mess up the orders. They’re actually really nice. I’m kind of surprised you told me about that,” regular customer Zeth Grijalpa said.

Police have the license plate number of the vehicle the woman accused was traveling in prior to the incident, which police say is considered assault.

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An arrest had not been made at the time of this report.