CHP officers responded early this morning to reports of a man walking between both northbound and southbound lanes of Highway 101 in Belmont. They arrived to find the man crossing back and forth on the freeway carrying a knife, and as CHP spokesman John Fransen tells ABC 7, the man did not respond and was not subdued after a Taser was employed.

"The pedestrian then produced a knife, held it over his head and lunged towards one of our officers. At that point, one of the officers opened fire," Fransen says to the station.

KRON 4 reports that the man was taken to the hospital with life-threatening injuries, and he has not yet been identified.

The Chronicle reports that the confrontation with the man began at 3:20 a.m. Sunday near Ralston Avenue, and the subsequent investigation forced the closure of northbound 101 until 7:30 a.m., four hours later.

Reportedly only one officer fired shots, and no officers were injured.

CHP and Belmont police continue to investigate, and Belmont police are asking anyone who knows anything about the man and how he ended up on the freeway to call (650) 595-7400.