Unidentified militants exploded a powerful bomb at the private residence of a Manipur minister in Bishenpur district, police said on Thursday.
However, there was no report of any casualty.
The ultras on Wednesday hurled the grenade at the residence of social welfare minister N Loken at Nambol Leimapokpam and it exploded near its gate, they said.
The minister and his family members were not present at the house when the incident took place as they stay at government quarters at Babupara area, police said.
Police are investigating whether the attack was connected with monetary demand from the minister or some other matter.
No individual or group so far has claimed the responsibility for the attack.