This could possibly be what Kerry is alluding to.
Iran ambassador to Moscow welcomes Putin nuclear proposal
MOSCOW (AFP) -- Iran's ambassador in Moscow late Monday welcomed an offer by Russian President Vladimir Putin to enrich uranium for Iran in Russia, an initiative that could allay international concern over Tehran's nuclear ambitions.
"This is a good initiative to find a way out of this situation. We think that Iran and Russia should find a way out together," the ITAR-TASS news agency quoted Gholam-Reza Ansari as saying in comments broadcast on Russia's state-owned Channel One television.
Ansari was reacting to remarks by Putin, who said that a Russian compromise deal with Tehran, which stipulates uranium enrichment could be carried out on Russian territory for Iran, was still in play.
"We have heard various points of view from our Iranian partners. The Iranian foreign ministry, notably, has said that it does not rule out accepting our proposal," Putin said earlier Monday at the close of talks with German Chancellor Angela Merkel in Moscow.
"Russia will continue cooperating with our European and American colleagues to resolve the Iranian problem," he added.
"Concerning the Iranian nuclear problem, it's necessary to work very carefully, without allowing abrupt, mistaken steps," Putin said.
The Russian proposal to enrich uranium on Iran's behalf has been welcomed by the West as a possible way out of the Iranian nuclear row.
Putin's comments came as high-level international talks were under way in London on a possible referral of Iran to the United Nations Security Council over its nuclear plans.
http://www.tehrantimes.com/Description.asp?Da=1/18/2006&Cat=2&Num=12 "Everything is now in the hands of the Iranian authorities, who still have a chance to agree to Russia's suggestion that they moderate their nuclear appetites and enrich uranium on our territory. If Tehran refuses, it risks losing its last defender - with unpredictable consequences for itself and the rest of the world."
http://news.bbc.co.uk/2/hi/middle_east/4620668.stm