Authorities are searching for a Hollywood paparazzo who may have caused Orlando Bloom to swerve and crash his car, injuring two passengers.

The Pirates of the Caribbean star told police he was being chased by paparazzi as he left an LA nightclub in his 2003 Toyota Matrix on Friday.

Bloom, 30, said a photographer in a silver or white vehicle made a sudden lane change and cut him off, claimed officer Ana Aguirre.

To avoid hitting the SUV, Bloom swerved but ended up crashing into two parked cars, Ms Aguirre said.

Although Bloom was not injured in the accident, two passengers in his car were hurt. Police said a 30-year-old woman in the front seat got cuts and bruises on her face, while a 35-year-old woman in the back seat fractured her neck. Both were treated at a local hospital. They were not identified.

In an email to The Associated Press, however, Bloom's publicist Robin Baum said the woman in the back seat "sustained a minor neck injury".

Bloom spent the night at Cedars Sinai to be with his childhood friend who hurt her neck, Baum said.

"Orlando Bloom, who was in a minor car collision late last night, is grateful that no one was seriously injured," Baum wrote.

"Bloom called for help immediately following the accident."

Authorities confirmed Bloom filed a police report and spoke with investigators at the scene. "No alcohol was involved, and he wasn't speeding," Aguirre said.