Charging Prime Minister Manmohan Singh with "lying to people and Parliament" on Indo-US nuclear deal, the CPI(M) on Thursday asked him to quit and said it would join hands with other parties to demand an immediate convening of Parliament.
"The only option left to them (UPA) is that the Prime Minister should quit. But neither will they convene Parliament session nor will they quit... It is a shameless government," party General Secretary Prakash Karat told reporters in New Delhi.
He alleged the government has been "lying" to Parliament and the people on the nature of the bilateral agreement reached with the US for civilian nuclear cooperation.
"It is evident that the Indian government was fully aware that the fuel supply assurances did not cover termination of the 123 agreement and they have deliberately misled the country," he said.
The Left parties, BSP, TDP, JD(S) and parties which opposed the deal would jointly meet President Pratibha Patil in the next couple of days to demand immediate convening of a session of Parliament.
"Why are they afraid of Parliament? Why are they running away. When a serious situation had developed in Jammu and Kashmir, a session should have been convened. But by not convening the session, the government has shown complete disregard and contempt for Parliament," he said.
"They are trying to even change the seasons of the country. Have you heard of monsoon in October?" he said referring to the government's decision to convene the next session from October 17.