BROOKLYN - Police arrested a 16-year-old girl in connection with the beating of another teen girl inside a Flatbush McDonald's.

A $1,000 reward is being offered as the NYPD looks for additional information and suspects. The violent brawl was caught on a cellphone camera inside the McDonald's on Flatbush Avenue Monday.

Aniah Ferguson faces robbery and gang assault charges.

The video, which has since gone viral on social media, starts out with two girls fighting, but several others join in. The victim is punched and kicked repeatedly, and ends up on the floor.

Despite a huge crowd of people in the restaurant watching, no one intervenes until the end.

The victim was severely injured but at this point is not cooperating with police.

The owner of the McDonald's says additional security measures have been put in place at the restaurant to ensure a safer environment for employees and customers.