OAKLAND (CBS SF/BCN) — A bicyclist was being treated for severe head injuries Friday and the driver of a Cadillac Escalade was being sought by Oakland police after a hit-and-run collision.

Oakland police said the collision was reported shortly after 4 p.m. in the 800 block of East 15th Street.

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The preliminary investigation has revealed that the bicyclist was traveling east on East 15th Street in a bike lane and was hit as he was going through the intersection at Eighth Avenue.

The bicyclist had a green light, according to police, and the driver of the Cadillac ran a red light while traveling south on Eighth Avenue.

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After the collision, the driver of the Cadillac put the car in reverse and headed east of East 15th Street. Investigators said speed appears to have played a role in the collision.

The bicyclist was identified as a 38-year-old Oakland man.

Investigators said speed appears to have played a role in the collision.

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Anyone with information about it is asked to call police department’s traffic investigation unit at (510) 777-8570.

Source: sanfrancisco.cbslocal.com.