New Delhi, Feb. 10 -- N Biren Singh's resignation as Manipur chief minister on Sunday set the stage for a change of guard in the northeastern state amid rumblings within the ruling Bharatiya Janata Party (BJP) and threats of a no-confidence motion by the opposition Congress.

"Had the CM not tendered his resignation it would have been embarrassing for the party on Monday when the assembly session was set to begin. The Congress's Manipur leaders had already announced they would demand no confidence motion against him," said a BJP leader.

Separately, at least five BJP MLAs had announced plans to sit in the opposition and all of this was communicated to the central leadership of the BJP.

"As many as 10 BJP MLAs resolved to sit in the opposit...