Chennai, July 9 -- Three school children died and three others were injured after a passenger train hit a school bus at a railway level crossing in Tamil Nadu's Cuddalore district on Tuesday, police said. The gatekeeper posted at the crossing has been suspended and arrested, Southern Railway officials said. Among those injured are another student, the bus driver, and a bystander, who rushed to help but got electrocuted after coming in contact with a live pole that damaged in the accident. Officials said that the van carrying the students was crossing the tracks between Cuddalore and Alappakkam, and was hit by the Villupuram- Mayiladuthurai passenger train. Due to the impact, the van was flung a distance away from the level crossing. The loco pilot managed to stop the train after traversing some distance, police said. "The driver insisted to allow to cross the gate to avoid delay in reaching the school, which was wrongly permitted by the gatekeeper, violating the rules and protocol... he has been suspended and process has been initiated for his dismissal from service," the Southern Railway said in a statement. P7...