Russian President Vladimir Putin said on Wednesday that Moscow’s adversaries probably understood how any attack on Russia or Russian forces using a “a nuclear element” could end. Putin was talking to the FSB security service, the successor agency to the Soviet KGB.For the latest updates on the Russia-Ukraine war, visit our dedicated page. Putin was speaking after Russia’s SVR foreign intelligence service earlier on Wednesday raised concerns about what it said was the possible transfer of elements of nuclear weapons technology to Ukraine. Russia updated its nuclear doctrine in 2024, setting out the defensive scenarios under which it would consider using them. It said it saw nuclear weapons as a means of deterring its enemies. Read more:Putin says Ukraine trying to sabotage peace process with threats to energy pipelines