A hand grenade was found near the Delhi Public School in ONGC Assam Assets headquarters at Nazira in upper Assam's Sibsagar district today, the police said.
The grenade was recovered from a drain by the side of the main gate of the school, the sources said.
A driver of the school bus noticed the explosive and informed the school authority which in turn reported the matter to the police, it said.
An investigation is on.
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