Taking its campaign against the Indo-US nuclear deal to MPs across the spectrum, the Communist Party of India-Marxist on Friday asked the government not to "rush through" with next steps to operationalise it and insisted on ratification of all treaties and agreements by Parliament.

"The objections and the apprehensions raised by the Left parties and other parties, organisations and concerned scientists and citizens need to be examined before proceeding," the central committee of the party said in a four-page open letter to MPs.

It also claimed that several provisions of the US law on the agreement were contrary to the assurances given by Prime Minister Manmohan Singh [Images].

Under the terms set out by the Hyde Act, it was clear that the Indo-US nuclear cooperation would not cover the entire nuclear fuel cycle. It denies cooperation or access in any form whatsoever to fuel enrichment, reprocessing and water production technologies, the party said.

Warning that the US does not see the agreement as a stand-alone one, the party has said it is part of the US design to try in India a wide-ranging strategic alliance which will adversely affect the pursuit of an independent foreign policy and our strategic autonomy.