Russia's demand for US guarantees may harm nuclear talks, Iran official says

FILE PHOTO: The Iranian flag flutters in front the International Atomic Energy Agency (IAEA) headquarters in Vienna, Austria July 10, 2019. REUTERS/Lisi Niesner/File Photo

VIENNA (Reuters) -Russia's demand for written U.S. guarantees that sanctions on Moscow would not damage Russian cooperation with Iran is "not constructive" for talks between Tehran and global powers to revive a 2015 nuclear deal, a senior Iranian official told Reuters on Saturday.

The announcement by Russia, which could torpedo months of intensive indirect talks between Tehran and Washington in Vienna, came shortly after Tehran said it had agreed a roadmap with the U.N. nuclear watchdog to resolve outstanding issues which could help secure the nuclear pact.