The NPT bars members that don’t have nuclear weapons from acquiring them. But critics call the treaty discriminatory.

The Iranian government says parliament is drafting legislation to withdraw from the nuclear Non-Proliferation Treaty (NPT) as it is engaged in an escalating military conflict with Israel.

Tehran’s threat on Monday to walk away from the international treaty comes after Israel launched an unprecedented attack on Iran’s nuclear and military sites, killing several nuclear scientists and scholars along with top military commanders.

Israel has said its attacks are aimed at stopping Iran from building a nuclear bomb. Iran has insisted its nuclear programme is for peaceful, civilian purposes. Meanwhile, Israel remains the only country in the Middle East with nuclear weapons – despite never officially acknowledging its arsenal or being a signatory to the NPT.

Since Israel launched the attacks on Friday, both countries have exchanged fatal salvoes, launching ballistic missiles and drone attacks on each other’s territories. The death toll from Israel’s attacks on Iran has risen to more than 220, including 70 women and children, while over 20 people have been killed in Iranian attacks on Israel. Late on Monday, United States President Donald Trump issued a warning to residents of Tehran to flee.