Russia's Foreign Minister Sergey Lavrov has postponed a planned visit to Minsk following the death of his Belarusian counterpart Vladimir Makei, according to Russian media reports quoting the foreign ministry. Belarus's state news agency Belta reported on Saturday that the long-standing foreign minister and associate of authoritarian leader Alexander Lukashenko had died suddenly. The cause of death wasn't given and Makei wasn't known to suffer from any chronic illness. Makei, 64, was due to meet Lavrov on Monday. Last week he attended a conference of the Collective Security Treaty Organization (CSTO) -- a military alliance of several post soviet states...