New Delhi: Indian Prime Minister Manmohan Singh says the government's stability is not threatened despite the communist party's withdrawal of support.

"I just learned it (about the withdrawal). But I don't think it will affect the stability of our government," Singh said in Sapporo, where he was meeting leaders of emerging economies on the sidelines of a G8 summit.

India's left withdrew its support for the ruling government over a civilian nuclear deal with the United States, the party said on Tuesday.

The communist parties had threatened to withdraw support if the deal with the International Agency went ahead. Prime Minister Manmohan Singh on Monday said that would happen “very soon''.

"That time has come," Prakash Karat, head of the Communist Party of India (Marxist), India's biggest communist party, told reporters.

The parties will formally announce their withdrawal in a meeting with India's president on Wednesday, Karat said.

This move will likely lead to a vote of confidence in the government.

However, the goverment hopes that the newly gained support from the regional Samajwadi Party will enable it to win such a ballot and avoid calling early general elections.

Prime Minister Singh is expected to accept the deal during the G8 summit held in Japan.