Tehran: Iran has prepared a package of “serious” proposals to help defuse a nuclear row with world powers, chief nuclear negotiator Saeed Jalili said on Monday.

Iran has said it would unveil ideas to help end the dispute over its nuclear programme, which Tehran insists is for peaceful purposes.

"Iran has serious proposals regarding the nuclear issue, about what to do to minimise the nuclear threat around the world," Jalili said without giving details of the package.

The proposals were discussed with Valentin Sobolev, acting secretary of Russia's National Security Council. Further talks are expected on Tuesday.

Sobolev, speaking through an interpreter at a joint news conference with Jalili, said he had discussed the nuclear issue, as well as technical and military cooperation.

"Iran's activities are peaceful and not a threat against any country," the Russian said.

The United States and Britain this month vowed a united effort to stop what they say is Iran's bid to build a nuclear bomb, possibly by expanding United Nations sanctions.

Russia, along with China, has been reluctant to back more sanctions against Iran in the past.