Hezbollah, which went on to fight repeated wars with the main U.S. regional ally Israel, has said other groups were responsible. Iran had complaints too. Iraq invaded Iran in 1980 and started using chemical weapons against Iranian soldiers and border villages from 1982 but Washington lent diplomatic backing in the war to Baghdad.

US president says he is becoming less confident Tehran will agree to halt uranium enrichment as demanded by Washington

Iran, amid US domestic turmoil and new sanctions, is prioritizing ties with Europe, Egypt, and Arab states, while leveraging nuclear talks and intelligence to pressure the US and isolate Israel.

The sixth round of Iran-US nuclear talks is planned for Sunday, Tehran said as the two sides appear locked in a standoff over uranium enrichment nearly two months into the high-stakes negotiations.

Spokesperson for the Iranian parliament Mohammad Bagher Ghalibaf stated that the latest US plan doesn't even mention lifting sanctions

Iranian Supreme Leader Ayatollah Ali Khamenei has rejected a US proposal on Iran’s nuclear program that demands giving up uranium enrichment, saying it is a crucial part of the country's nuclear program.

The United States has pulled some diplomatic staff and military families out of the Middle East, citing unspecified regional security risks.

Trump, who has revived his “maximum pressure” campaign of sanctions on Iran since taking office in January, has repeatedly said it will not be allowed any uranium enrichment under a potential deal. On Tuesday, Iran’s top negotiator, foreign minister Abbas Araghchi, said the country “will not ask anyone for permission to continue enriching uranium”.