International Atomic Energy Agency chief Rafael Grossi is set to visit Tehran on Wednesday for crucial talks on Iran's nuclear programme, warning just ahead of his trip that room for manoeuvre is narrowing.

Help Us,' UN Nuclear Watchdog Chief Tells Iran Ahead of Visit By Richard Valdmanis BAKU (Reuters) - U.N. atomic watchdog chief Rafael Grossi appealed to Iran's leadership on Tuesday to take steps to resolve longstanding issues with his agency a day before he arrives in the Iranian capital for crunch talks over its nuclear programme.

The head of the United Nations nuclear watchdog warned Tuesday that "the margins for manoeuvre are beginning to shrink" on Iran's nuclear programme ahead of an important trip to Tehran.

Iran is building a “defensive” tunnel within Tehran’s metro network over fears of further Israeli strikes on the capital.According to Jafar Tashakori, the head of Tehran’s city council transport committee,

Iran’s foreign minister has reiterated that his country does not seek an escalation in the Middle East but reserves the right to defend itself against Israel’s attack with a “measured and calculative” response.

Iran's Islamist regime considers negotiating with Donald Trump instead of continuing to act adversarially, The New York Times reports.