The United States will continue to take practical, aggressive steps to make it difficult for Iran to sell drones and missiles to Russia, Vedant Patel, deputy State Department spokesman, said, adding that Washington has a number of tools to restrain Moscow and Russia.

He did not give details of the steps, but pointed out that Washington had already applied sanctions and export controls as a response. He also added that the deepening alliance between Russia and Iran is a phenomenon that the world should consider a profound threat.