A sixth teenage girl has been arrested in the caught-on-camera beating of a 15-year-old girl at a New York City McDonald's.

Police say a 15-year-old girl was arrested Wednesday night and charged with robbery and gang assault in the March 9 beating in Brooklyn.

Two 17-year-old girls and girls ages 14, 15 and 16 also have been arrested in the brawl.

A video captured a large group attacking a 15-year-old while dozens of onlookers watched and cheered. Authorities say the victim suffered a black eye and other injuries.

Police have said McDonald's workers called 911, but apparently no one in the crowd tried to help.