Russian air strike kills one, injures six in Ukraine's Kharkiv, mayor says

​A ‌Russian ​air ‌strike on Kharkiv, Ukraine's ‌second-biggest city, ‌killed one ⁠person ​and ⁠injured another six, ⁠Mayor Ihor ​Terekhov said ⁠on ⁠Telegram ​late on Sunday.