A motorcyclist was killed Saturday during a crash with a box truck on the Golden State (5) Freeway in downtown Los Angeles, authorities said.

The crash occurred at about 9:45 a.m. Saturday on the southbound freeway, just north of the Pomona (60) Freeway, according to the California Highway Patrol.

A representative from the Los Angeles County Office of Medical Examiner was dispatched to the scene at 10:44 a.m., the CHP said.

A Sigalert was issued at 10:01 a.m. closing four lanes of the southbound freeway, just south of Fourth Street, for at least 90 minutes. It was extended for an additional 90 minutes at 10:40 a.m., but the No. 4 lane was re-opened.

No further information was immediately available.

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