Save for later Print Download Share LinkedIn Twitter Renewed efforts to revive stalled nuclear talks between Iran and the US are under way — but the outcome remains far from certain, with both success and failure still distinct possibilities. Shuttle diplomacy gained momentum once again this week, with visits to Tehran by the EU's Iran nuclear talks coordinator Enrique Mora followed by Qatari Emir Tamim bin Hamad al-Thani. The emir's subsequent visit to Europe, including Germany and the UK, is seen as a possible positioning of Doha as a "go-between" with Tehran in the talks, one observer of regional affairs says. Despite the latest push, International Atomic Energy Agency (IAEA) chief Rafael Grossi dampened hopes of progress by telling a European parliamentary committee this week that Tehran had not “been forthcoming in the kind of information we need from them” on its nuclear activities. This could complicate Iran's negotiations with the US and the E3, which comprises France, Germany and Italy. “The situation does not look very good,” Grossi said.