Greater Noida: In the recent past group clashes is on the rise among students, with four B.Tech students injured recently in a clash between two groups in the knowledge park area here, police said. The four students arrived at their college in a vehicle this morning, where a group of students attacked them, they said. According to police, Anuj, Dimple, Vivek and one other student were injured in the clash and the glass panes of their vehicle smashed. The matter is being probed, a senior police official said. Meanwhile, a student assaulted a teacher when he stopped him from consuming liqour in the college premises. The teacher has made a complaint against the student with Kasna police station, they said.