UPDATE: 9:30 a.m.

A 54-year-old man died in a moped crash in Waimanalo early today.

Positive identification is pending.

Police said the moped operated by the man was traveling westbound on Waikupanaha Street when for unknown reasons he lost control and struck a concrete car stop or bumper on the side of the road just before 3:30 a.m.

He was then thrown from his moped on to the roadway.

Police said the 54-year-old man was pronounced dead at the scene. He was not wearing a helmet at the time of the crash.

Police noted speed was not a factor. It is unknown at this time whether alcohol or drugs were involved.

This is the 20th traffic-related fatality on Oahu this year compared to 27 at the same time last year.

7:50 a.m.

Honolulu police are investigating a deadly moped crash that occurred in Waimanalo early today.

The crash involving a male operating a black moped occurred on Waikupanaha Street sometime before 4 a.m.

A tow truck removed the moped from the crash scene just after 7 a.m.

Additional details on the crash are forthcoming.

6:20 a.m.

Police have reopened a section of Waikupanaha Street in Waimanalo.

Officers had closed lanes between Mahailua and Kakaina streets to conduct a traffic investigation sometime before 4 a.m. today.

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Police have closed a section of Waikupanaha Street in Waimanalo due to a traffic investigation.

The closure is between Mahailua and Kakaina Streets and took effect shortly before 4 a.m.

Motorists are advised to seek alternate routes.