LOS ANGELES (Reuters) - Movie star George Clooney fractured a rib and his girlfriend broke her foot when the two were knocked off his motorcycle by a car in New Jersey on Friday, the actor's spokesman said.

Clooney, 46, and his companion, Sarah Larson, were treated for their injuries at the Palisades Medical Center, across the Hudson River from Manhattan, and were released, spokesman Stan Rosenfield said.

"He was treated for a hairline fracture of a rib and road rash," he said. Larson, who was a passenger on the motorcycle driven by Clooney, suffered a broken foot. Both were wearing helmets.

Rosenfield told Reuters the accident occurred when a motorist signaled a left-hand turn, but turned right and struck Clooney's motorcycle. The publicist said he did not know whether the driver of the car was cited for the accident.

Clooney, who won an Oscar last year for his supporting role in the political thriller "Syriana," was with Larson during his day off from production on his latest film, the Coen brothers' "Burn After Reading," co-starring Brad Pitt, John Malkovich and Frances McDormand.

Larson, described in various media accounts as a cocktail waitress and onetime contestant on gross-out gameshow "Fear Factor," has been shown in recent published photos kissing and holding hands with Clooney.