Kylie Jenner's Security Attacks Another Photog ... Police Investigating

Kylie Jenner's security didn't just attack a TMZ photog ... he allegedly went after another guy who dared to take a pic of her and her rumored BF, PartyNextDoor, and now he's filed a criminal complaint.

Charles Baker claims he was in the snack bar area of the Chinese Theatre Wednesday night for a Russell Simmons event, when he tried to take a pic of Kylie and PartyNextDoor when her security guard punched him in the face. He says his camera was damaged in the attack.

Baker filed a police report and has already lawyered up.

As we reported, a member of Kylie's security team also attacked our TMZ photog outside the event on a public street, grabbing the camera and trying to delete the video.