At the same time that Russia is condicting its latest massive military drill on the border with Ukraine, and one day after the latest stark warning by Ukraine' president Poroshenko that the simmering conflict with Russia may be set to explode again when he said on national TV that "the probability of escalation and conflict remains very significant" adding that "we don't rule out full-scale Russian invasion", Russian president Putin made a not so subtle point that Crimea will not be relinquished when he flew into contested territory on Friday, one day after staging war games there, and said he hoped Ukraine would see "common sense" when it came to resolving a diplomatic crisis over the peninsula.

Officially, Putin arrived on a working visit in Crimea, where he held a briefing with members of the Russian Security Council and visited the Tavrida international youth forum, a RIA Novosti correspondent reported Friday.