SAN DIEGO (FOX 5/KUSI) -- A motorcyclist was killed in a crash Monday on Interstate 805.

The incident occurred around 5:27 p.m. on I-805 southbound from the 43rd Street on-ramp, California Highway Patrol said in a news release Tuesday.

The 21-year-old man was riding a Yamaha motorcycle on I-805 when for unknown reasons he veered to the right, left the roadway, went into an ascending vegetation embankment and crashed into a palm tree, according to authorities.

The motorcyclist was pronounced dead at the scene.

A toxicology report is pending through the San Diego County Medical Examiner’s Office.

The crash is under investigation.

Anyone with information about the collision is asked to contact the CHP San Diego Area directly at 858-293-6000.

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