WEST POINT, Neb. (AP) — A hospital in northeast Nebraska says seven people have been injured following an incident at a nearby petroleum distributor center.

St. Francis Memorial Hospital in West Point says in a statement that seven people were taken to the facility Wednesday afternoon following an incident at Sapp Bros. Petroleum in West Point, about 70 miles northwest of Omaha.

Two people were in critical condition and taken to a hospital in Omaha. Five others had minor injuries and were treated either in the emergency room or a nearby medical clinic.

Craig Schmaderer told The Associated Press he was several blocks away from Sapp Bros. when he felt a small vibration. He says he saw large flames and black smoke fill the air.

Authorities have not released any information about the incident.