Supreme leader insists nuclear research is for peaceful purposes to produce energy; senior Iranian negotiator at Vienna talks says parties are 'closer than ever'

Nasrallah reportedly left secure Beirut bunker to visit Tehran, where Iranians told him they expect his Lebanese terror group to respond militarily if Israel hits their facilities

State Department spokesman says US in 'very final stages' of talks indirect talks with Islamic Republic aimed at salvaging the 2015 agreement

French foreign minister says Iran has a 'clear choice' in the coming days; Tehran says it wants to see US Congress issue statement on commitment to possible agreement

Foreign minister tells Financial Times that 'as a matter of principle' Iranians don't trust the words of any head of state, and in particular US president

Envoy meets Russian representative, expected to meet US envoy; Tehran news site says Israeli presence is 'a deterrent to progress'

US lawmaker in Jerusalem for meetings on Iranian nuclear program, as Washington's negotiations with Iran continue in Vienna

Speaking alongside visiting Irish minister, Iranian top diplomat accuses West of 'tampering with text and playing for time' in talks; calls for full removal of sanctions

PM meets US lawmaker in Jerusalem as nuclear talks heat up; House Speaker Pelosi to visit Knesset Wednesday

But top Iranian security official accuses Western negotiators of pretending to come up with initiatives to avoid agreeing to any obligations