NORFOLK, Va. (WVEC) -- A motorcyclist was killed after crashing inside the Downtown Tunnel on Monday morning.

Virginia State Police say the single-vehicle accident happened around 5:45 a.m. in the westbound lanes of the tunnel. Police say the adult male's motorcycle hit the wall of the tunnel. He was taken an area hospital, where he later died.

Both sides of the tunnel were closed for a time following the accident, with eastbound lanes opening up a short time later. Westbound traffic was fully reopened by 7 a.m.

State Police say they are not sure if speed was a factor at this time, and the accident remains under investigation.