Investigation is on and the police is yet to confirm the nature of the blast.
"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 blast took place underneath a truck, where people were loading goods. So, there is a possibility of blast in the engine. Everything will be confirmed after thorough investigation," Bhuyan said, adding darkness in the locality has made the task of security forces more difficult.
The deceased has been identified as Manilal Gupta (55), while the injured have been rushed to Assam Medical College in Dibrugarh, the SP said.
On if there was any intelligence input about any such activity, Bhuyan said, "There was intelligence report of ULFA movement in the area."
On November 20, a tea-grower was shot dead while another one was critically injured in an attack by suspected ULFA(I) terrorists at Duarmara Reserve Forest in neighbouring Tinsukia district.
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