Ukrainian president urges world leaders to back peace plan in general assembly speech ahead of Biden meeting

• Vladimir Putin warns west he will consider using nuclear weapons

Volodymyr Zelenskyy has told the United Nations that Russia is planning to attack Ukrainian nuclear power plants as he repeated his calls for unity from world leaders in order to force Russia to the negotiating table to conclude a “just peace”.

His comments came as Vladimir Putin on Wednesday escalated his nuclear rhetoric, telling a group of senior officials that Russia would consider using nuclear weapons if it was attacked by any state with conventional weapons.