One school pupil has been killed and several more injured after an explosion in a classroom.

At least three of the injured teenagers are in a critical condition after a grenade exploded in a computer classroom. The incident happened in the village of Agvali in Dagestan in Russia’s North Caucasus region.

Agvalinskaya school principal, Shamil Abakarov, said the weapon was allegedly brought into the building by an eighth grade pupil.

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