Russia on Thursday sharply raised the stakes in its dispute with the West over Ukraine, with a top diplomat refusing to rule out a Russian military deployment to Cuba and Venezuela if tensions with the United States mount.

Deputy Foreign Minister Sergei Ryabkov, who led the Russian delegation in Monday’s talks with the U.S. in Geneva, said in televised remarks that he would “neither confirm nor exclude” the possibility that Russia could send military assets to Cuba and Venezuela if the talks fail and U.S. pressure on Russia mounts.

The negotiations in Geneva and Wednesday’s NATO-Russia meeting in Vienna failed to narrow the gap on Moscow’s security demands amid a buildup of Russian troops near Ukraine. While Moscow demanded a halt to NATO expansion, Washington and its allies firmly rejected that as a nonstarter.

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Speaking in an interview with Russian RTVI TV, Ryabkov noted that “it all depends on the action by our U.S. counterparts,” pointing to Russian President Vladimir Putin’s warning that Moscow could take military-technical measures if the U.S. provokes the Kremlin and turns up military pressure on it.

While voicing concern that NATO could potentially use Ukrainian territory for the deployment of missiles capable of reaching Moscow in just five minutes, Putin noted that Russian warships armed with the latest Zircon hypersonic cruise missile would give Russia a similar capability if deployed in neutral waters.

Read more: AP