A female photographer told authorities Wednesday that Rob Kardashian "grabbed her camera and removed the memory card" while she was taking photographs and that he struck her in the face.
Kardashian is the younger brother of the three best-known Kardashians: Kourtney, Kim and Khloe.
"The paparazzi alleged that while she was photographing Rob Kardashian, he grabbed her camera and removed the memory card. During the struggle, the paparazzi stated that she was struck in the face by Rob Kardashian," according to a statement from the Beverly Hills Police Department.
Police said the photographer reported the incident about 1 p.m. Wednesday and said it occurred near South Santa Monica Boulevard and Moreno Drive.
"The paparazzi identified the suspect as Rob Kardashian, who fled the location with the memory card," police said, adding the the investigation was ongoing.