The Latest Breaking News from Jake Sullivan

As the UN marks the International Day for the Total Elimination of Nuclear Weapons, the United States has warned Russia of "catastrophic" consequences if it uses nuclear weapons as part of the Ukraine invasion.

US National Security Adviser Jake Sullivan said the United States would respond to any Russian use of nuclear weapons against Ukraine after President Putin declared he would use them

The United States would respond decisively to any Russian use of nuclear weapons against Ukraine and has spelled out to Moscow the "catastrophic consequences" it would face, US National Security Adviser Jake Sullivan said on Sunday. Sullivan's remarks represented the latest American warning following the thinly veiled nuclear threat made…

The United States would respond decisively to any Russian use of nuclear weapons against Ukraine and has spelled out to Moscow the "catastrophic consequences" it would face, U.S. National Security Adviser Jake Sullivan said on Sunday.

US national security adviser says: ‘Any use of nuclear weapons will be met with catastrophic consequences for Russia’

PM tells US president she wants peace agreement ‘upheld’ amid concerns about row with EU

Those exchanged include 10 foreign citizens and the Ukrainian commanders who defended Mariupol.

The leaders made the remarks as they sat down to talks also centring on the Russian invasion of Ukraine and the energy crisis it has provoked

The leaders also had a ‘good discussion’ on relations between the UK and EU when they met at the United Nations General Assembly.