Latest US Weapons Shipment to Ukraine Triggers Warning From Kremlin

Russia's President Vladimir Putin (front) and Kremlin spokesman Dmitry Peskov attend a session of the Council of Heads of the Commonwealth of Independent States (CIS) in Sochi, Russia, on Oct. 11, 2017. Maxim Shemetov/AFP/Getty Images

Russian officials have issued a warning after President Joe Biden confirmed in an opinion piece that the United States will send advanced rocket systems to Ukraine.

Writing in The New York Times on May 31, Biden said his administration will send “more advanced rocket systems” to Kyiv as part of a new military package.