FILE PHOTO: A view shows the logo of the Ukrainian state energy company Naftogaz outside its headquarters in central Kiev, Ukraine December 2, 2019. REUTERS/Valentyn Ogirenko/File photo
FILE PHOTO: A view shows the logo of the Ukrainian state energy company Naftogaz outside its headquarters in central Kiev, Ukraine December 2, 2019. REUTERS/Valentyn Ogirenko/File photo