A Kremlin spokesman has refused to rule out the possibility of Russia using nuclear weapons. Dmitry Peskov, chief spokesman for the Russian president, told CNN that Vladimir Putin could use nuclear weapons if Moscow faced "an existential threat".
When asked in an interview if Putin would use his nuclear option, Peskov said: "We have a concept of domestic security. And it's public.
"You can read all the reasons for nuclear arms to be used. So if it is an existential threat for our country, then it can be used in accordance with our concept."
