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ESCONDIDO, Calif. – A motorcyclist was killed Wednesday morning after being thrown from his bike and then run over by on-coming traffic, Escondido police said.

The motorcyclist was driving on East El Norte Parkway when he ran into the back of a pickup truck and was thrown from the bike. A semi truck ran over the motorcyclist and he was pronounced dead at the scene, according to Escondido Police Captain Mike Loar.

The driver of the semi did not stop, but Escondido police are not treating this as a hit-and-run as they believe the driver was unaware of the accident at the time. Nonetheless, the driver of the semi was being sought by police.

The 1600 block of East El Norte Parkway was closed in both directions while investigators looked into the crash.

The motorcyclist’s identity has not yet been released. Anyone with information is asked to call police.