ANAHEIM, CALIF., JAN. 17 -- A dragster crashed into a wall and hurled wreckage into the audience during a demonstration at a motor sports show in Anaheim Stadium, injuring 17 people, authorities said today.

Six people injured in the Saturday night accident remain hospitalized today. The others were treated at the scene or treated and released.

The dragster was supposed to make a short run as a promotion for an upcoming event but failed to stop and crashed into a five-foot field wall at about 9.10 p.m., police Sgt. Thomas Lahmon said.

The rear axle and wheels came off and flew into the stands. The driver, George Scott of San Bernardino, was uninjured.

A witness, Dennis Slagle of Ontario, said that when the dragster reached the end of the track,"It just kind of exploded like a grenade." The dragster hit a sled being used in the evenings's tractor-pull contest and clipped an equipment worker standing in front of the wall, Lahmon said.

One of the injured, Marta Mowery of Costa Mesa, was listed in serious but stable condition at Western Medical's sister hospital in Anaheim, nursing supervisor Corinne Adams said.

Others hospitalized were not seriously hurt, hospital officials said.