ALMATY (Reuters) – A Russian-led security bloc will hold military drills in Kazakhstan from Sept. 26 to Oct. 8, the Kazakh defence ministry said on Thursday, telling the public not to be surprised by the arrival of foreign troops and military vehicles. Kazakhstan is a member of the Collective Security Treaty Organisation (CSTO) which also includes Belarus, Armenia, Kyrgyzstan and Tajikistan as well as Russia. The drills will take place at an unusually tense time for the bloc, with Russia involved in the Ukrainian conflict, Armenia unhappy with CSTO’s refusal to back it in fresh clashes with Az…