The Ukrainian Air Force said on Saturday it has destroyed three Russian fighter jets. Two Sukhoi Su-34 fighter bombers and one Su-35 were shot down on the eastern section of the front, air force chief Mykola Oleshchuk posted on Telegram. Shortly beforehand, Ukrainian troops in the eastern Ukrainian region of Donetsk had been forced to withdraw from the industrial town of Avdiivka. The Russian Air Force had been intensively bombing Ukrainian positions on the front line for days with precise guided bombs. Russian sources did not initially confirm the downing of the aircraft. However, Russian mil…