A 51-year-old man was critically injured when he was struck by a vehicle while walking through the Sepulveda Boulevard tunnel near Los Angeles International Airport (LAX) Thursday, October 26th, police said.

The man, who was identified by police as Roy Nelson and has no known residence, received massive head and upper torso injuries in the accident, which occurred in the tunnel at about noon, Los Angeles Police Department (LAPD) West Traffic Sgt. Murrel Pettway said.

Nelson was taken to the UCLA Medical Center, Westwood, where he was listed in critical condition, Pettway said. No other injuries were reported.

Nelson was walking southbound in the Sepulveda Boulevard tunnel between Century Boulevard and Imperial Highway in Westchester when he attempted to cross the southbound lanes, possibly to reach the center median wall, Pettway said.

As Nelson approached the center median, he was struck by a 1989 Toyota Camry, driven by a Rancho Palos Verdes man, he said.

LAPD West Traffic police and Los Angeles City Fire Department paramedics were called to the scene.

Witnesses reported to officers that Nelson appeared to be unaware of his surroundings as he crossed the busy roadway, Pettway said.

Pedestrians are not allowed in the Sepulveda Boulevard tunnel at anytime, he said.

The driver of the Camry, who was not injured, was interviewed at the scene and released.

The tunnel was closed until about 2 p.m.

During the accident investigation, traffic on Century Boulevard westbound was rerouted to Sepulveda Boulevard northbound and to the 96th Street bridge for access into LAX.