The incident was reported around 11:30 am today and a bomb squad that rushed to the spot confirmed it was a live Chinese grenade.
It was defused soon after, Thamar said.
"A thorough investigation will be conducted to nab the culprits and police will also try to find out if it was fallout of a political rivalry in the area," he said.
Meghalaya is set to go to polls on February 27 and the results will be announced on March 3.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)