Top Iranian and U.S. officials will resume talks in Vienna this week on reviving the 2015 nuclear pact, officials from both countries said on Wednesday, though they played down chances of a breakthrough and placed the onus on each other to compromise.
The ball is in Washington's court to save the pact, Iran's chief negotiator Ali Bagheri Kani tweeted before heading to Vienna, calling on Washington to "show maturity & act responsibly".
