Russia has called on NATO to explain its expanding military activities in eastern Europe.<br /><br />It comes after NATO military chiefs expressed concern that Russian forces on the Ukrainian border could pose a threat to eastern and southern Ukraine.<br /><br />Speaking after meeting with Kazakh leaders, Russia’s Foreign Minister Sergei Lavrov said: “As for NATO’s plans to increase its presence in the territories of its members in Eastern European states, our stand is that Russian-NATO relations are also regulated by certain rules. According to these, there must be no additional constant military presence on Eastern European territory.”<br /><br />Lavrov went on to say that Russia had the right to move troops within its territory and that its forces will return to base after their exercises end.