Over 80 MPs of the United National Party have signed the 'Confidence Motion' supporting Prime Minister Ranil Wickremesinghe yesterday.
Informed party sources said two MPs would sign the letter today.
About 10 MPs representing the party, they said, are currently overseas and they will sign the motion before April 04.
The no-confidence motion against Wickremesinghe is to be taken up for debate in Parliament on April 04.