PONTIAC (WWJ) – A Rochester Hills man remains in critical condition Friday morning after he was thrown from his motorcycle in Pontiac.

The Oakland County Sheriff’s Office said the 30-year-old was driving his motorcycle on East Walton near Baldwin around 2:48 p.m. Wednesday when a Chevy Malibu, driven by a 55-year-old Pontiac resident, turned in front of him into a grocery store parking lot.

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Police say the motorcyclist crashed into the car and was thrown from his bike. He lost his helmet before landing on the sidewalk, according to police.

A Chevy Silverado, driven by a 47-year-old Auburn Hills resident, was waiting to exit onto Walton from the parking lot when it was hit by the Malibu after the initial crash, investigators said.

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The motorcyclist was transported to McLaren Pontiac and later air-lifted to Royal Oak Beaumont where he is listed as being in critical condition.

The drivers of the Malibu and Silverado were not injured.

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Police do not believe alcohol or speed were factors in the crash, which remains under investigation.