A crash involving a big rig on U.S. Highway 101 near South San Francisco caused a fuel spill and knocked out power to Caltrain overhead lines, authorities said.

Motorists planning to travel on southbound Highway 101 between Brisbane and South San Francisco were advised to expect delays after a crash Thursday morning closed multiple lanes. An 18-wheeler struck the bridge railing along the right shoulder of the highway just before 5 a.

The early morning crash spilled 160 gallons of diesel fuel on the freeway and sent debris into nearby high-voltage power lines, cutting power to Caltrain.