At least four students were injured on Thursday in a clash between two groups of school students in Punjab during which one group fired at the other, the police said.

A police official said two students of Government Senior Secondary School at Bhagalikalan, in Majitha town, 40 km from here, were seriously injured when two students from the second group, who had brought a home-made pistol, fired at them following the clash.

The official in Majitha said the clash was a result of an altercation between two groups of senior students of classes 11th and 12th. The students first clashed inside the class with hockey sticks and again in the school campus.