EU’s top diplomat Josep Borrell says that if Iran “took a further step in its military assistance to Russia” a nuclear deal with the West will be endangered.

But in an interview with the WSJ, Borrell appeared determined to continue efforts for a nuclear deal despite less interest by the United States, the United Kingdom, France and Germany, initial signatories of the JCPOA.

Nuclear talks that began in April 2021 to restore the 2015 deal known as the JCPOA, and lasted 18 months, failed to produce an agreement. Iran presented new demands last year, which effectively stopped the talks before popular protests broke out in Iran in September and Tehran began delivering kamikaze drones to Russia.

Tehran’s new demands in the talks, that Washington called “extraneous,” and its military assistance to Moscow, in addition to a bloody crackdown on protests brought formal talks to an end.

Borrell said that he has warned Tehran not to expand its military cooperation with Russia by refraining to deliver missiles in addition to hundreds of Kamikaze drones it has already supplied. He added that if Iran takes this step the US and Europe will lose interest in restoring the JCPOA.

Borrell blamed former US President Donald Trump for the deal’s collapse, when he exited the JCPOA in May 2018 and imposed heavy sanctions on Tehran.

Critics of the accord have insisted that the JCPOA was a “weak” agreement that would have allowed the Islamic Republic to have an unfettered nuclear program once most of its provisions expired by 2030.