LAS VEGAS — The Latest on a pre-dawn crash that injured a Las Vegas police motorcycle officer (all times local):

3:05 p.m.

Authorities have identified a 19-year-old motorist who is being held on suspicion of driving under the influence of drugs after a pre-dawn crash that injured a Las Vegas police motorcycle officer.

Police say David J. Williams was driving a 2003 Hyundai Accent that struck the marked 2014 police Harley Davidson motorcycle from behind about 4:15 a.m. Friday on Tropicana Avenue near Durango Drive.

Sgt. Richard Strader said the 43-year-old police officer was taken to University Medical Center with neck, back and leg injuries that weren’t believed to be life-threatening.

The officer’s name wasn’t immediately made public.

Jail records showed that Williams, of Las Vegas, was being held without bail pending an initial court appearance.

Police said he wasn’t hurt in the crash, and remained at the scene.

It wasn’t immediately clear if he had an attorney.

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8:10 a.m.

Police say a motorcycle officer is hospitalized but is expected to recover, and a driver is jailed on suspicion of driving under the influence after a pre-dawn crash several miles west of the Las Vegas Strip.

Sgt. Richard Strader says the officer was riding on the motorcycle when it was struck from behind by a faster-moving car a little after 4 a.m. Friday on Tropicana Avenue near Durango Drive.

Strader says the officer has neck, back and leg injuries but was conscious and speaking with medics when he was taken to University Medical Center. His injuries aren’t believed to be life-threatening.

The driver of the car wasn’t hurt, and remained at the scene where he was arrested.

The names of the officer and the driver weren’t immediately made public.

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6:30 a.m.

Authorities say a Las Vegas police motorcycle officer has been injured in a crash.

Police say the officer was on the motorcycle when it was struck from behind a little after 4 a.m. Friday near an intersection several miles west of the Las Vegas Strip.

KLAS-TV reports the officer was conscious and speaking with medics when he was taken to University Medical Center with unspecified injuries.

The driver of the car wasn’t hurt, and remained at the scene.

The intersection at Tropicana Avenue and Durango Drive was closed during the investigation.