text: A shocking surveillance video showing a mob of teenagers beating two high school students on a subway platform has been released. The footage captured at Spring Garden station in Philadelphia on Tuesday shows the group of youngsters viciously attacking the victims just seconds before the train pulls into the station. They then pull them to the ground, punch them and repeatedly stamp on their heads. Brawl: The footage captured at Spring Garden station in Philadelphia on Tuesday shows the group of youngsters viciously attacking the victims . Targeted: They then pull them to the ground and punch them. Other parts of the brawl are hidden from the cameras behind pillars in the subway station . The brawl, involving students from Benjamin Franklin High School, even spilled onto the tracks, with one person falling onto the line during the confrontation. As a train pulls up, both the victims and some of the suspects appear to get on the same carriage. Witnesses tried to intervene, but couldn't break up the group as the assailants kept on hitting the helpless youngsters. About a dozen students appear to be egging the fight on which officials have said may have started because of a dispute over a girl. The victims were allegedly followed into the station from the street. As they got onto the platform, someone pointed them out with a signal. Southeastern Pennsylvania Transportation Authority Police Chief Thomas J. Nestel III told Philly.com: 'It’s an outrageous event. This is so dangerous, it’s not even funny. We have operating trains down there. There are passengers waiting for the train... it’s horrendous. 'We've identified some potential aggressors. There is a criminal investigation with the school district," Nestel said. "The message that we're trying to get out is if you act up on SEPTA, we're going to have a picture of your face and we're sharing it with the school district. School district spokesman Fernando Gallard also told the news website those involved could be expelled or face serious disciplinary action. 'What we have seen is a brutal violent attack that could that could have ended with a loss of life.' SEPTA detectives are said to have spoken to the two boys who were victims in the attack. Dangerous: At one point the fight spills onto the tracks when one of the suspected attackers falls onto the line . Brutal: One youngster is seen stamping on the head of one of the victims behind a subway map . Bystanders: The fight continues as the train pulls into the station. Some witnesses do their best to intervene but fail to break the mob up . Gone: Police officers and station staff try to search for the assailants who have all boarded the train .
target: Brawl at Spring Gardens station in Philadelphia was captured on CCTV .
  Fight involved students from nearby Benjamin Franklin High School .
  At one point an attacker falls onto the tracks, but manages to get back up .
  After the confrontation, the victims and attackers walk onto the same train .