LAS VEGAS - Celebrity crime writer Dominick Dunne was taken to a Las Vegas hospital Monday after he said he was stricken by pain while watching testimony in the O.J. Simpson armed robbery-kidnapping trial.

Reached by telephone, Dunne, 82, said he was being checked by doctors and expected to be released later in the day.

"Tell them not to worry. I'm fine," he said. "They're going to check me out and I'll go back to the hotel and watch the trial there today."

Dunne left the courtroom after a court marshal noticed his distress. He was checked by paramedics in the hallway before he was wheeled away on a gurney, sitting up and talking.

The Vanity Fair magazine writer has spent decades covering society and celebrity trials, including Simpson's murder trial in which he was acquitted in 1995 of killing his ex-wife, Nicole Brown Simpson, and her friend, Ronald Goldman.

Dunne has been fighting bladder cancer and has said in recent interviews that the Simpson trial would likely be his last. He has said he plans to write his memoirs.

"I'm a fighter. I'm not giving up," he said Saturday.

Dunne has said he plans to return to New York at the end of the week for medical tests.