The United States on Thursday sanctioned two Chinese companies and a Russian affiliate involved in making and shipping attack drones and warned the two countries to halt cooperation boosting the Ukraine war effort.

The Treasury Department announced Thursday it was imposing sanctions for the first time on Chinese entities directly developing and producing drones that Russia is using in Ukraine. “Russia increasingly relies on the expertise of foreign professionals and the import of sophisticated technologies to sustain its weapons program and advance its military campaign against Ukraine,

Andriy Kowalenko, head of the Ukrainian Centre for Countering Disinformation, warns that the Russian Federation is stockpiling missiles and transporting fuel to major military airports, from which extensive attacks on Ukraine are launched.