Russia has warned the West again that it considers weapons to the Ukrainian armed forces to be “legitimate targets,” the latest threat coming on the day President Biden announced an additional $800 million in increasingly tailored security assistance to Ukraine.

Senior Russian officials have made similar statements periodically since Russian launched its invasion in late February, and the most recent came from Sergei Koshelev, deputy director of the foreign ministry’s North America division.

RIA Novosti quoted him as saying during a ministry round-table on “the crisis in U.S.-Russia relations” that Moscow will view U.S. and NATO arms convoys as “legitimate targets” if they enter Ukrainian territory.