The situation in Ukraine has increased the internal tension in the CIS and will complicate the relations between its member countries, Russian political analyst Dmitry Oreshkin told Rosbalt (www.rosbalt.ru). He said that even today, such CIS member countries as Belarus and Kazakhstan, which have achieved the closest integration with Russia within the Customs Union, participate in these organizations only because "it is economically profitable for them" and "only to the extent that is profitable for them".