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A pickup truck driver died in a crash on Interstate 680 in Alamo that was precipitated by a wheel falling off a van on the other side of the freeway and careening over the median Thursday afternoon, according to the California Highway Patrol.

The situation unfolded around 1:30 p.m. Thursday (April 17) on I-680 just south of the Stone Valley Road interchange, according to CHP’s Contra Costa office. Officers were called to the scene of a reported “vehicle vs. wheel” crash on the southbound side of the freeway.

The initial investigation indicates a Ford van traveling on the northbound side of I-680 had its left rear wheel become detached for unknown reasons, according to the CHP.

“The wheel continued traveling north when it crossed over the concrete center divider, and struck a Toyota Tundra traveling on the opposite side of I-680,” CHP officials said. “Tragically, the driver of the Toyota sustained fatal injuries and was pronounced deceased on scene.”

The name of the decedent has not yet been released. The driver of the Ford van, whose identity also wasn’t revealed, remained at the scene and cooperated with authorities, the CHP said.

The crash, investigation and cleanup closed portions of both sides of the freeway through Alamo that afternoon, with the final lanes reopening at around 4:20 p.m., according to the CHP.

The circumstances of the fatal collision remain under CHP investigation. Anyone who witnessed what transpired or may have other relevant information can call the Contra Costa office in Martinez at 925-646-4980 or email 320Investigations@chp.ca.gov.

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Jeremy Walsh is the associate publisher and editorial director of Embarcadero Media Foundation's East Bay Division, including the Pleasanton Weekly, LivermoreVine.com and DanvilleSanRamon.com. He joined...