Who are the groups supposedly behind incursions into Russia's Belgorod region? Analysis by Diana Magnay, Russia correspondent Murky goings-on in Russia's Belgorod region, just across the border from Kharkiv in eastern Ukraine. The Kremlin says a group of armed Ukrainian saboteurs have infiltrated Russian territory and that a combination of Russian armed forces are working to "eliminate" them, adding that the president has been informed. Aerial videos posted to social media show fighting in a number of border villages, with Russian Mi-8 helicopters deployed. In one video, a helicopter appears to be releasing anti-missile decoy flares as it flies above...