Israel has launched what it is calling a "preemptive strike" against Iran and declared a state of emergency, according to Defense Minister Israel Katz.

President Trump warned that a "massive" war could break out in the Middle East over Iran's nuclear program, after the U.N. nuclear watchdog said Iran wasn't complying with its nonproliferation duties.

The decision comes as officials say they believe that Israel is preparing to launch a military attack on Iran. Tehran condemned the vote.

Iran has warned it will ramp up its nuclear activities after the United Nations nuclear watchdog’s 35-member board of governors adopted a resolution Thursday declaring it in breach of its non-proliferation obligations.

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

A source familiar with the details told the Post there is "definitely a chance" that a sixth round of nuclear talks between the United States and Iran will not take place.

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

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