Los Angeles police are looking for a man who beat up a 16-year-old girl at a McDonald's counter after she complained about him cutting in line.

Police announced their investigation Tuesday night and posted surveillance video online.

Police say the girl, her 5-year-old niece and a friend were standing in line on Sept. 14 at the McDonald's in South Los Angeles. The suspect and two young boys then approached the counter when the 16-year-old started arguing with the man over who was first in line.

Police say the girl swore at the man, who then got angry and punched her in the face several times.

The suspect left with the boys in a red pickup truck.

The teenager was treated for her injuries at a hospital and released.