WALNUT CREEK (CBS SF) – A pedestrian fatally struck by a vehicle on Interstate Highway 680 near Walnut Creek early Saturday morning has been identified as 52-year-old Thomas Jancek, according to the Contra Costa County coroner’s office.

The crash was reported around 1 a.m. on northbound Highway 680 near Treat Boulevard, according to the California Highway Patrol.

A Sig-alert was issued, and all lanes of traffic were temporarily closed while investigators cleared the scene.

Details of the subsequent investigation were not immediately available Monday morning.

Jancek was a resident of Walnut Creek, according to the coroner’s office.

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