The Russian president said he will deploy nuclear weapons in neighbouring Belarus.
President Vladimir Putin says Russian nuclear weapons will be stationed in Belarus, drawing sharp criticism from the West.
The European Union has called Putin’s comments irresponsible, and warned the Kremlin ally Belarus it could face more sanctions.
Ukraine has called for an urgent meeting of the United Nations Security Council, accusing Moscow of making Minsk a “nuclear hostage”.
The Russian president also warned he would be forced to react if the United Kingdom supplied Ukraine with armour-piercing ammunition containing depleted uranium.
So could the war take a new turn? And how might NATO respond?
Presenter: Nick Clark
Pavel Felgenhauer, Defence and military analyst
Susi Snyder, Programme coordinator at the International Campaign to Abolish Nuclear Weapons
Samuel Ramani, Associate fellow at the Royal United Services Institute