Gunmen open fire on US school bus

Two gunmen are on the run after opening fire at high school students in the US.Six pupils were injured, two of them seriously, in the shooting in Las Vegas, Nevada.Police said the attack happened after an argument over a girl spilled into the streets.All six casualtues - five boys and a girl - were taken to a local hospital for treatment. Four have been released but two 18-year-olds remain in hospital.Clark County School police spokesman Ken Young said: "At the beginning of school there was a fight among three students. Officers quickly broke up that fight and arrested them."Police said the shooting after school appeared to be related to that incident and that it appeared the gunmen were waiting for the students to step off the bus."The original report said witnesses heard four to five shots and saw two children on the ground. Seconds later we got another call that another person heard about ten gunshots and saw four kids fall," said Las Vegas Police spokesman Ramon Denby.The incident comes after two other gun tragedies in the US in recent days - a pair of weekend shootings at a Christian Missionary training center and a church in Colorado in which a 24-year-old man killed four people and then himself, and a shopping mall rampage in Omaha, Nebraska, last week in which a 19-year-old killed eight people and then himself with an assault rifle.Mr Denby said police had detained five or six people for questioning but had not arrested any suspects and could not yet provide a description of the two assailants, other than to say that they were male. Gang investigators are working on the case.© Independent Television News Limited 2007. All rights reserved.

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ITN | December 12, 2007