US President Donald Trump has repeatedly threatened Iran with bombing if it does not reach a new nuclear deal. The next round of talks is due this week, with Trump saying negotiations would be held on Thursday while Tehran says they will take place on Sunday in Oman.

Iran warns of an "unprecedented" retaliation if Israel attacks, while President Trump describes the Middle East as a "dangerous place."

US-Iran nuclear negotiations face a critical delay due to a scheduling dispute, amid growing tensions over uranium enrichment, sanctions, and looming IAEA censure.

The major step is the culmination of several festering stand-offs between the International Atomic Energy Agency and Iran.

These evacuations come at a time when US intelligence has reportedly hinted that Israel is preparing to hit the nuclear facilities in Iran.

The United States and Israel are seeking to turn nuclear talks into a "strategic trap" for Iran, Iranian lawmakers said in a statement on Tuesday, days before a planned sixth round of Iran-U.S. nuclear talks.

Iran says intelligence documents taken from Israel better prepare it to respond to any potential Israeli air strikes.

The US and Iran have been negotiating a nuclear deal for around two months, with Oman mediating. They have held five rounds of talks.