Reacting to news reports of Arunachal Pradesh chief minister Dorjee Khandu's body being identified, the Congress on Wednesday termed the incident "very unfortunate" and said that in the light of two similar crashed in the region in the recent past a deeper investigation was needed.

Party spokesperson Jayanthi Natarajan said that inhospitable terrain and bad weather had set search operations back. It took five days for governmnet search teams to spot wreckage of the chopper that had carried Khandu and others.

"Without understanding the factors behind the crash, I would refrain from talking much about the issue. But yes, investigations is required," Natarajan said.

On the comments on the UPA's attempts at reviving diplomatic ties with the Pakistan that BJP leader Arun Jaitley made in the light of the elimination od al Qaeda founder Osama bin Laden in Abottabad in Pakistan, Natarajan said that the governmnet had always put terrorism at the centre of the talks with Pakistan on each of these occassions.

She said that UPA was fully committed to eliminating terrorism and would not continue dialogue with Pakistan until it gave assurances toward fighting terrorism thriving on its soil.

"The fact is that we insist that all infrastructure of terror in Pakistan must be stopped. Otherwise, there will not be any bilateral progress," she stated.