The photographer in question, Carl Wu, was apparently trying to get photos of Kidman after a Calvin Klein fashion week event. When he approached the actress by bicycle, his brakes failed and the rider collided with Kidman (as reported by TMZ). Both ended up on the ground.
Someone associated with Nicole Kidman called the police about the incident. While Wu was issued a ticket, the police were not inclined to pursue the matter further. The photographer was, however, seen entering a police station later in the afternoon.
Reports indicate that Kidman will press charges against Wu. No visible injuries were sustained by either party during the accident itself, and the actress simply got up and entered the hotel afterward.