Nalbari (Assam), Jan 11 (Agencies): The banned ULFA on Tuesday raised its voice for the first time against Bangladeshi infiltration in Assam and warned that the problem will soon become a major threat to Delhi.

"The illegal Bangladesh national issue has posed a serious threat to the state," ULFA 'foreign secretary' Sashadhar Choudhury told a public rally here after his release from the Gauhati Central Jail on bail.

"If I am selected to take part in the (peace) negotiations between the ULFA and the Indian government, then my first agenda will be to raise the Bangladeshi immigration issue," the ULFA leader, who was hiding in Bangladesh till his arrest there in December 2009, said.