Explosions in Kyiv, Reuters witnesses say; Ukrainian air force says Kyiv under threat of missile attack

​Explosions ‌jolted ​the ‌Ukrainian capital Kyiv late ‌on Monday, ‌Reuters ⁠witnesses said, ​and Ukraine's ⁠military ⁠said the ​city was ⁠under threat ⁠of ​a ⁠missile attack.