Explosions have been reported in Kyiv. The air defense system is in operation, according to the Mayor of the capital, Vitali Klitschko. “Explosions in the city. Air defense system is in operation. Do not leave shelters!” – wrote the mayor. Reaction of the American embassy The U.S. Ambassador Bridget Brink has responded to the explosions in the capital. She noted on Twitter (X) that air raid sirens have been sounding since 5:00 a.m. in Kyiv and throughout Ukraine today. “By 6:15 a.m. we could hear the air defense working in the capital – thank you, brave air defenders! – underscoring once again…