Stung by Nationalist Congress Party leader P A Sangma's attack on the issue of imposition of President's rule in Nagaland, the Congress on Friday said that his statement was designed to destablise the region and was against national security.

It also reminded the former Lok Sabha speaker that his party was a partner in the United Progressive Alliance government.

"The statement of Sangma, criticising the UPA government's decision to impose President's rule in Nagaland, is self-incriminatory," said All India Congress Committee spokesperson Abhishek Singhvi.

"He forgets that his party is also a partner in the government," he said.

Singhvi further said that Sangma's statement was designed to destabilise the region and was against national security.

"The word used by Sangma about destabilisation is quite unfortunate and smacks of impropriety. It is contrary to the interest of the region which is very precious to the country," he said.

Sangma had flayed the Centre's decision to impose President's rule in Nagaland and termed it as a ploy to rig the ensuing assembly election.

Singhvi said that the Union government had taken a decision for imposition of President's rule in the state as the government led by Nephieo Rio had been reduced to minority.

"It was the Congress which was the single largest party in Nagaland and the outgoing chief minister formed the minority government with the support of others," he said.

"There was total assassination of Parliamentary democracy in Nagaland prior to the imposition of President's rule in the state," Singhvi said.