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NORTH PERRY, Ohio- The man suspected of killing four U.S. Marines in Chattanooga, Tennessee spent a short time working at the Perry Nuclear Power Plant in Lake County, Ohio.

Mohammad Youssuf Abdulazeez, 24, shot and killed four Marines, and wounded three more people on Thursday. The shootings happened at a military recruiting center and a Navy operations center. He was killed in police gunfire.

Continuing coverage of the Tennessee shooting here

Abdulazeez was “briefly and conditionally” employed at the Perry Nuclear Power Plant for 10 days in 2013. A plant spokesman said he was never granted unescorted access and never entered a secured area at the plant.

The alleged shooter also worked for a company in Independence that same year. Ashley Castillo with Medra Marketing said Abdulazeez worked as a sales associate during the summer. She said it was his first job out of school and that he passed his background check, but had an OVI.

Castillo told Fox 8 I-Team reporter Lorrie Taylor there was nothing remarkable about Abdulazeez. Another colleague described him as a cool guy.

When employees at Medra Marketing learned of the shooting, they wondered what were his motives.

This is a developing story. Stay with FOX 8 and for the latest information.