Two grenades were lobbed by suspected NDFB (Songbijit) militants at the Panbari camp of 18 Mahar Regiment in Assam's Chirang district today injuring an Army Radio Operator, a police spokesman said.
The grenades were suspected to have been lobbed from a school campus adjacent to the army camp, the spokesman said.
The unexploded grenades were later destroyed by the disposal team of Army, he said.
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Investigation is on.