Police are investigating a violent attack caught on camera on an MTA bus in the Bronx.

Officials say two teenagers were attacked Friday heading home from school on the BX-1 bus.

A cellphone video of the incident shows what authorities say are two sisters allegedly assaulted by three other girls.

One of the victims was punched and kicked in the head as the other was punched, kicked and had her hair pulled.

No arrests have been made.

Anyone with information is asked to call Crime Stoppers at 1-800-577-TIPS.