“Tehran is now participating in hostilities on the ground directly and indirectly through the supply of weapons,” RIA Novosti quoted him as saying.
Kirby said Russia allegedly received "dozens of drones" from Iran and "the Russian military is already using" these drones.
Earlier, the European Union published in the official journal the decision to impose sanctions against three individuals and one organization from Iran for allegedly supplying Russia with drones.
The official representative of the Russian Foreign Ministry, Maria Zakharova, called "far-fetched" allegations of alleged deliveries of Iranian UAVs to Russia.