Two local councillors have submitted a motion to their constituency Labour party calling for a vote of no confidence to be passed in First Minister Vaughan Gething.
It is thought to be the first such motion to be proposed within Welsh Labour since Nation.Cymru revealed in February that Mr Gething had accepted donations to his party leadership campaign totalling £200,000 from a company owned by businessman David Neal, who received two suspended prison sentences for dumping toxic sludge in the protected wetlands landscape of the Gwent Levels.