The United States and allies are warning Iran that major Western economies will pile new sanctions on Tehran if it moves forward with an emerging plan to provide ballistic missiles to Russia for its war with Ukraine.

The United States and allies warned Iran on Friday that major Western economies will pile new sanctions on Tehran if it moves forward with an advancing plan to provide ballistic missiles to Russia for its war with Ukraine.

The Biden administration has raised alarms for months that Russia is seeking close-range ballistic missiles from Iran as Moscow struggles to replenish its dwindling supplies.

The U.S. has yet to confirm that missiles have moved from Iran to Russia. But U.S. officials are alarmed by comments by Iranian officials that suggest that a deal is imminent.