May 28 (UPI) -- The U.S. embassy in Kyiv plans to remain open and maintain its normal operations after Russia warned foreign citizens and diplomats to leave the city before it launches more attacks. The announcement comes days after Russian Foreign Minister Sergey Lavrov told U.S. Secretary of State Marco Rubio in a phone call that Russia's armed forces are preparing to launch "systemic and consistent" strikes against Ukrainian armed forces position and other locations "against the relevant