LIVERMORE, Calif. (KRON) – All northbound Highway 84 traffic is closed from Jack London Boulevard to Interstate 580, according to a tweet from the Livermore Police Department.

The reason is a fatal traffic collision between a car and a motorcyclist, according to police. Just before 5:30 a.m. the car struck the motorcyclist, who was pronounced dead at the scene.

Police are asking people to avoid the entire area of northbound Highway 84 and Isabel Avenue.

The driver of the car remained on scene and is cooperating. The identity of the motorcyclist will be released after the notification of their family members.

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“It will be closed for several hours,” police stated in the tweet. “We will keep you posted on when it reopens.”

Anyone with information about the collision is asked to contact the non-emergency line at 925-371-4987.

This is a developing story. Check back for updates.