It was reported on the 15th local time that the air defense alarm was sounded throughout Ukraine and there was an explosion in Kiev, the capital of Ukraine. According to the report, Alexei Kuleba, the military chief of Kiev, Ukraine, warned that there was a threat of missile attacks in Kiev and urged people to stay in safe places. According to AFP, the mayor of Kiev said that two residential buildings in Kiev were attacked by missiles, and several missiles were shot down by air defense systems over Kiev. (Liu Xinshe)