The shadow Scottish secretary has revealed he has concerns about one of the contenders to become the next leader of the Scottish Conservative Party.
John Lamont accused one of his Scottish colleagues of a "Trojan Horse" plan to break up the party.
So far, six MSPs have put their names forward, almost a fifth of the entire Tory contingent in the Scottish Parliament.
Justice spokesperson and former journalist Russell Findlay is reportedly seen as the frontrunner. North-east MSP Liam Kerr, deputy leader Megan Gallacher, ex-Olympian Brian Whittle and former justice and education spokesperson Jamie Greene are also standing.
But it's Murdo Fraser, who stood for the top role in 2011, who Mr Lamont has bee critical of.
He claimed the "real purpose" of Mr Fraser's bid is to split the Scottish party from the UK party, something Mr Fraser wanted to do in 2011.
The veteran MSP has since changed his mind and no backs setting up a commission to examine party structures.
In spite of that, Mr Lamont wrote in the Scottish Daily Mail that "a split party shouldn't be on the table".
He added: "But it is clearly Murdo’s preferred option and I’m concerned it’s the real purpose of his leadership bid and his proposal for a ‘commission’.
"As it stands, this looks like a commission to separate our party. It looks like a Trojan Horse for splitting the party and raises more questions than it answers."
He went on to say he was "a little dismayed" to see Mr Fraser criticise Douglas Ross, insisting that it is important to avoid "blue-on-blue attacks".
In response, Mr Fraser said: “I won’t be indulging in blue-on-blue attacks on other candidates or misrepresenting their platforms in the leadership race, and I am disappointed that others don’t seem to be taking the same approach.
"Whoever wins we need to have a united party to move forward.”