In Moscow they say that the FSB “will avenge the guys and will not leave all this unpunished.”
An attack by Ukrainian saboteurs on the Russian border in Crimea is a cause for war, but the start of hostilities now would be the best gift for Hillary Clinton in the US presidential election.
Russian political scientist Oleg Matveychev told PolitNavigator about this.

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“In general, this is a casus belli. A reason for war, by and large. When the borders of our state are attacked. It is clear that the most decisive diplomatic steps will be taken, some notes of protest will be announced and everything else. And in a purely military area, no one, of course, will succumb to provocation, because now both the Ukrainian side, and, above all, the Americans, really need a conflict.
Just the other day, WikiLeaks published Clinton’s PR strategy, which indicates that the main feature of her election campaign is the confrontation with Moscow. In this regard, it urgently needs some kind of military action in the world, just as Saakashvili supported the McCain campaign when he attacked South Ossetia.
Clinton is going to score points by criticizing Russia. And civilians and military people will die. Donbass and Crimea will be exactly the territories that she will want to use in her election campaign.
Hence the increase in tension that is now around Donbass and Crimea. Accordingly, we do not intend to give such a gift to Clinton, so they will try to create these provocations themselves in every possible way, and we must be prepared for this.
The answer from the point of view of the intelligence services, I think, will be adequate, but we will not know about it. The intelligence services, as a rule, take revenge for their guys and do not leave it all unpunished. Therefore, some actions will be taken, but, I repeat, we will not know about them. These will be proactive actions and in response to this situation,” concluded Matveychev.
Moscow says the FSB will "avenge the guys and will not leave this unpunished."