"The enrichment of nuclear material—and, now we can say it outright, the future production of nuclear weapons—will continue," Medvedev, a top ally of Russian President Vladimir Putin, wrote in his Telegram post. "A number of countries are ready to directly supply Iran with their own nuclear warheads."

On the heels of US attacks on three nuclear sites in Iran Saturday, here's a look at which nations currently possess nuclear weapons.

Iranian foreign minister calls attacks a betrayal of diplomacy