The police was conducting investigation in the area under Tingkhong police station and was yet to confirm the nature of the blast due absence of any explosive material.
"Till now one person has died and at least 27 others have been injured. We are yet to ascertain what kind of blast it is as we have not found any explosives from the site," Dibrugarh Superintendent of Police Rana Bhuyan said.
He said police was trying to find out whether it was a grenade blast, a crude bomb or an IED.
The deceased has been identified as Manilal Gupta (55), while the injured have been rushed to Assam Medical College in Dibrugarh, the SP said.
There was a crowd at the blast site because of the weekly Sunday market and the place was the main sopping point of the Rajgarh town.
On if there was any intelligence input about any such activity, Bhuyan said, "There was intelligence report of ULFA movement in the area."
