Iran and the United States disagree about the amount of damage caused by American bombing raids on Iranian nuclear facilities.
That's according to Kremlin foreign policy aide Yuri Ushakov.
Speaking earlier, he said Moscow welcomes the ceasefire between Iran and Israel and hopes it lasts.
But he stressed the fundamentally different explanations about the US strikes on Iran.
"The one that carried out the strikes believes significant damage was inflicted," the Russian official said.
"And the one who received these strikes believes that everything was prepared in advance and that these objects did not suffer excessive, significant damage," Ushakov told reporters.
Watch below: Sky's Tom Clarke explains why some Iranian nuclear sites were spared and not attacked by Israeli or US bombers
A spokesman for Iran's foreign ministry said earlier on Wednesday that the US strikes had caused significant damage to Tehran's nuclear facilities.
Earlier in the day, the Kremlin had said it thought it was too early for anyone to have an accurate picture of the extent of damage caused.