<p>Sources said the militants lobbed the grenade inside the premises of Jim Higher Sceondary School at Sangaiporou at the outskirts ofImphal late last night.<br /><br />Non-payment of monetary demand from the school authorities could be the reason, sources said adding that no individual or organisation has claimed responsibility.<br /><br />In another development, Northern Valley Stone Crushers Welfare Association today organised a sit in protest at Koirengei area in Imphal west district against the monetary demand of Rs. 50 lakh made to some individual stone crushers by some militant outfits, a spokesman of the association said.</p>
<p>Sources said the militants lobbed the grenade inside the premises of Jim Higher Sceondary School at Sangaiporou at the outskirts ofImphal late last night.<br /><br />Non-payment of monetary demand from the school authorities could be the reason, sources said adding that no individual or organisation has claimed responsibility.<br /><br />In another development, Northern Valley Stone Crushers Welfare Association today organised a sit in protest at Koirengei area in Imphal west district against the monetary demand of Rs. 50 lakh made to some individual stone crushers by some militant outfits, a spokesman of the association said.</p>