Russian forces tried to advance in eastern Ukraine and trained tank, mortar and artillery fire on Kherson in the south, the Ukrainian military said, as Western allies sought to buttress Ukraine and its neighbours against Moscow. FIGHTING * The recently liberated Ukrainian city of Kherson has lost its power supply after heavy shelling by Russian forces, the regional governor said. * Spanish security forces found a third suspected explosive device hidden in an envelope mailed to a European Union satellite centre located at an air force base in Torrejon de Ardoz, outside Madrid, the defence ministry said. DIPLOMACY, FOREIGN RESPONSE...