Russian-made yellow cake, a type of uranium powder that helps turn it into a nuclear fuel, “is in Iran and Iran’s enriched uranium cargo will be sent to Russia” within the next several days, according to top Iranian officials quoted this week in the country’s state-run press.

Senior U.S. officials confirmed on Thursday that the Obama administration backs the opening of commercial nuclear trade between Moscow and Tehran.

“Commercial contracts are in place for Iran to ship its enriched uranium stockpiles to Russia,” Stephen Mull, a State Department official who is leading the administration’s charge to implement the nuclear deal, told lawmakers.

“We expect that this material, about 25,000 pounds of … low enriched uranium, will leave Iran in the coming weeks” and make its way to Russia, according to Mull.