The Russian air force has destroyed a grain warehouse during an attack in eastern Ukraine, according to official Ukrainian reports on Sunday. The building in Vovchansk was bombed in an aerial attack and largely destroyed, police spokesman Serhiy Bolvinov said on Facebook. In the town not far from the border with Russia, a building for grain handling was also destroyed in the overnight attack, Bolvinov wrote. “Fortunately, there were no casualties,” he said. A destroyed grain warehouse was recognizable in the attached photos. The information could not initially be independently verified. Since …