Witnesses say the suspect in an Oklahoma workplace beheading had been trying to convert his coworkers to Islam before the fatal attack.

Authorities have released 911 calls made as 30-year-old Alton Nolen beheaded one woman and stabbed a second.

Police say Nolen was fired from his job at Vaughan Foods, then took a car, drove around to the front of the business, ran into another vehicle, and then walked into the front office with a produce knife. They say he began stabbing 54-year-old Colleen Hufford before beheading her. Then, he stabbed 43-year-old Traci Johnson.

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Authorities say Mark Vaughan, the COO and a reserve county deputy, then jumped into action, shooting Nolen.

It is still very unclear whether Nolen’s beliefs in Islam played a role, but it appears the victims were not specifically targeted.

Nolen went to prison for assaulting a state trooper after a 2010 traffic stop, then leading police on a 12-hour manhunt through the woods.

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The suspect and second victim are in the hospital in stable condition.