Humza Yousaf is reportedly considering quitting as First Minister of Scotland.
Sources close to Mr Yousaf have indicated he could give up his role but a final decision has not yet been taken, according to outlets including the BBC and The Times.
A source told the BBC on Sunday night that “the clock has been ticking ever downwards” for the First Minister.
Meanwhile, SNP MSP Michelle Thomson told BBC Radio Scotland on Monday morning that she has heard “rumours” he is considering stepping down.
“I guess the rumours suggest that something is afoot, but I honestly can’t clarify because I’ve had no update nor, as I understand, have my MSP group, so I guess we’ll all hear definitively one way or another this morning.”
Ms Thomson went on to describe the First Minister as an “honourable man” who is “well liked” within the SNP Holyrood group.
It comes as he faces two votes of no confidence – one from the Scottish Conservatives, and another from Scottish Labour, which has tabled one for the Scottish Government as a whole.
Votes on the motions are expected at Holyrood in the coming week.
Mr Yousaf has previously said he will not resign and that he intends to win the confidence votes.
His former partners in government, the Scottish Greens, have said they are continuing to back the votes of no confidence.
He added: “I don’t think there is anything that Humza Yousaf will be able to say to restore the trust he has broken.”
The First Minister requires the support of at least one member of the opposition at Holyrood.
Alex Salmond’s Alba Party has reportedly distanced itself from making such a deal with Mr Yousaf, leaving the First Minister’s fate in the hands of the Scottish Greens.
The leader of the Scottish Greens expressed regret over the breakdown in the powersharing deal, but described the First Minister’s position as nevertheless untenable.
“Everybody understands how deeply regrettable and unnecessary this whole situation was,” he said, adding: “I think it is really important that we return to stability.”
On BBC Radio Scotland on Monday, Mr Harvie later said Mr Yousaf should stand down, but insisted he bears no “personal ill will” against him.
“But it is clear that Humza Yousaf, in the decision that he made last week, has broken trust with the Scottish Greens, cannot command a majority in Parliament, and we stand ready to work with someone who can.
“Because the SNP are by far and away the largest party in Parliament, they’re just short of a majority, they are capable of providing stable minority Government, they have a responsibility to do so.
“I think opposition parties have a responsibility to play their part. It’s been done before, it can be done again, but Humza Yousaf, I’m really sorry to say, is no longer in a position to do that, because it has to depend on trust.”
On Sky News, Labour’s deputy national campaign coordinator Ellie Reeves said on Monday: “No-one voted for Humza Yousaf and given all of the chaos I think there should be an election up in Scotland so that people in Scotland can have their say on what’s happening up there.
“At the moment they are being failed by an SNP government in Holyrood and a Conservative Government in Westminster.”