European diplomats have told Iran they plan to retain European Union ballistic missile sanctions set to expire in October under the defunct 2015 Iran nuclear deal, four sources have said, in a step that could provoke Iranian retaliation.

The sources cited three reasons for keeping the sanctions: Russia's use of Iranian drones against Ukraine; the possibility Iran might transfer ballistic missiles to Russia; and depriving Iran of the nuclear deal's benefits given that Tehran has violated the accord — albeit only after the United States did so first.

Keeping the EU sanctions in place would reflect Western efforts to prevent Iran from developing nuclear weapons and the means to deliver them despite the collapse of the 2015 deal, which then-U.S. President Donald Trump abandoned in 2018.