(CNN)Russia may be forced to use a nuclear weapon if Ukraine's counteroffensive succeeds, senior Russian official Dmitry Medvedev said Sunday -- the latest in a series of nuclear threats made ...

If Ukraine’s ongoing counteroffensive against Moscow’s invasion captures Russian territory, there would be no alternative to using strategic nuclear weapons, Russia’s Dmitry Medvedev warned on Sunday.

FILE PHOTO: Russia's Security Council deputy head Medvedev meets military personnel in Ulyanovsk region ...

Deputy Chairman of Russia’s Security Council Dmitry Medvedev told the media. "Their speculations to the effect time is ripe to come to the negotiating table and start peace talks merely show how ...