Updated

A police officer killed a motorist on the crowded Las Vegas Strip after a dispute over the driver's noisy car stereo.

Police Capt. James Dillon said the man defied an order from two bicycle officers late Tuesday to turn his stereo down, then drove off with one officer hanging onto his car. His vehicle collided with a taxi and hit a pole, knocking the officer unconscious.

The other officer fired once, killing the driver, Dillon said.

The Strip was crowded with visitors at the time, and one gave a videotape to KLAS-TV that showed officers pulling the man from his car and handcuffing him near the Bally's, Bellagio, Caesar's Palace and Flamingo casinos.

It was the 18th shooting involving a Las Vegas police officer this year — a sharp increase from 13 reported in all of 2005.

The motorist's identity was not immediately released.