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.

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.

A truck crash on Highway 101 early Thursday morning brought down power lines and spilled 160 gallons of fuel, causing major delays for Caltrain service between San Francisco and South San Francisco. The crash occurred around 5 a.

A two-vehicle crash involving a jackknifed big rig on Southbound 101 near South San Francisco spilled 160 gallons of fuel, caused major backups, and impacted Caltrain service.

Caltrain lost power Thursday morning from San Francisco to South San Francisco after a major truck crash on Highway 101 knocked down a fence onto power lines and spilled fuel, according to transit agency.