If Iran refuses to return to the terms of the 2015 nuclear deal, US Special Envoy for Iran Rob Malley warned on Wednesday that the US is prepared to explore all options.

In a virtual appearance at a Washington think tank, he said, “We will be prepared to adjust to a different reality in which we will have to deal with all options to address Iran’s nuclear program if it is not willing to come back into the constraints” of Tehran’s 2015 nuclear deal with six major powers.

Malley embraced a more aggressive rhetorical posture toward Tehran in rare public remarks if it refused to restore compliance with the deal, under which Tehran pledged to limit its uranium enrichment program – which might lead to fissile material for a bomb – in exchange for sanctions relief.

Malley claimed the US and Israel, which has previously bombed nuclear installations in Iraq and Syria, are unified in their opposition to Iran acquiring a nuclear weapon, and he talked about implementing US sanctions aimed at preventing Iran from selling its oil abroad.

“There is every possibility that Iran will choose a different path, and we need to coordinate with Israel and other partners in the region. I will be traveling to Saudi Arabia, UAE (United Arab Emirates) and Qatar in just a matter of days to talk about efforts to come back to (the nuclear deal) and what options we have to control Iran’s nuclear program if we can’t achieve that goal,” Malley said.