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The head of the state's mental health division was killed Wednesday afternoon when his bicycle collided with a tractor-trailer.

Police said that Steven Jordan, 49, was riding his bicycle on Louisburg Road near Perry Creek Road around 2:15 p.m. when he was struck by the tractor-trailer.

Jordan was pronounced dead at the scene. He was the director of the Division of Mental Health, Developmental Disabilities and Substance Abuse Services for the state Department of Health and Human Services.

Jordan had been hired in July 2010 to help oversee the state's mental health system. Previously, he had been state director for ResCare, a private treatment provider to people with disabilities and youths with special needs.

Investigations are still try to determine what caused the accident, according to police spokesman Jim Sughrue.