A man walking on the 110 Freeway in downtown Los Angeles was struck and killed by a vehicle early Sunday morning, according to the California Highway Patrol.

The collision was first reported around 4 a.m. in the northbound lanes just south of the 101 Freeway.

All northbound lanes of the 110 Freeway were closed for the investigation, and lane closures continued for several hours.

Traffic was moving freely again by 8 a.m.

CHP is trying to determine why the victim was walking on the freeway. His identity was not released.

No injuries to drivers were reported.