SAN RAMON (CBS SF) — A 39-year-old motorcyclist died in a crash involving two big-rigs and another vehicle on southbound Interstate Highway 680 in San Ramon early Monday morning, a California Highway Patrol spokesman said.

The crash was reported around 4:40 a.m. on the highway just south of Bollinger Canyon Road, CHP officials said.

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It began when a Honda rear-ended a big-rig, then spun around and became disabled in the No. 3 southbound lane, CHP Officer Derek Reed said.

The 39-year-old motorcyclist then struck the Honda and was ejected. Shortly afterward, a second big-rig struck the motorcycle and the 39-year-old, who was pronounced dead at the scene, Reed said.

His name is not yet being released until his next of kin is notified of the death, Reed said.

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The second big-rig struck the center median and caught fire. A small amount of oil also spilled onto the roadway, according to Reed.

All southbound lanes except the far right lane were blocked for more than four hours while crews put out the fire, cleared the vehicles from the roadway and cleaned up the spilled oil, Reed said.

The lanes reopened by 8:55 a.m.

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