UPDATE 3 P.M.

The Honolulu Medical Examiner identified the 49-year-old man who died due to a fatal motorcycle accident as Brian Berrigan of Honolulu.

His cause and manner of death are still pending.

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All H-1 westbound lanes in Aiea are closed due to investigation of a fatal motor vehicle collision.

Emergency medical services says a 49-year-old male was dead upon arrival.

The shut down is between Moanalua Road and the Aiea Heights overpass. 

Police are investigating a crash that happened around 4:30 a.m. Thursday morning.

Motorists are being diverted via Kamehameha or Moanalua.