Deputy prime minister Muhyiddin Yassin will decide whether or not to support a vote of no confidence against his former boss, Prime Minister Najib Abdul Razak, in line with the Umno whip's decision.

"I have no idea if a vote of no confidence will be taken, that is theoretical for now.

"As a responsible party member, I will make a decision according to the party's parliamentary whip," Muhyiddin told reporters at a press conference in his private residence in Bukit Damansara today.