A police official said that eye witnesses had claimed that two motorcycle-borne miscreants hurled the grenade post midnight at the house of Union minister of state for railways.
No one was injured as the grenade did not explode, the official said.
Security forces, which rushed to the spot, later defused the grenade.
The miscreants immediately fled the scene after hurling the grenade.
Gohain and his family were not in Nagaon yesterday and only security guards were posted at the house.
Disclaimer: No Business Standard Journalist was involved in creation of this content