(WUSA) -- A Loudoun County Sheriff's Office authorities say a pedestrian who was struck on Route 28 at Sterling Boulevard in Loudoun County just after 8 a.m. Wednesday stepped in front of a tractor trailer on purpose.  Authorities say the man was trying to take his own life.

The man suffered serious injuries and was airlifted to a hospital. 

Both southbound and northbound lanes were closed for the transport, but reopened at approximately 9:15 a.m.

Authorities continue to investigate the incdient.

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