Within an hour of the blast, ULFA's military wing chief Paresh Barua claimed the responsibilities of the blast occurred in Guwahati's Rajiv Bhawan injuring five people, including Assam Congress general secretary Ranjan Bora and party spokesman Mehdi Alam Bora.
Publicity chief of the anti-talk ULFA faction, Arunodoy Dohoti claimed, "We claim responsibility for the blast and would like to warn the Congress party that we are still capable of attacking and the explosion is just a warning to them."
Police initially called it a grenade attack but the officials later turned out that a bomb had been planted in the office, concealed in a garbage bin.
Recently, the terror outfit had threatened to attack the the ruling party accusing it of engineering a split in the militant group and luring a section of its leaders, including its chairman Arabinda Rajkhowa, in the name of peace talks.
However, snubbing the ULFA leader's threats, Chief Minister Tarun Gagoi claimed, "Threats to our leaders and workers by ULFA is nothing new. Let me make it very clear that we shall never be cowed down by such threats of attacks on our lives."
The blast ironically happened when a part of ULFA led by Arabinda Rajkhowa is engaged in unconditional peace talk with the government. Though, his some of his former fellow members of the terror outfit opposed him terming the talks "unconstitutional."
The blast also feared many people as the state is going to hold its crucial assembly election on Apr 4 and Apr 11.