Russia has rejected claims that it is planning to use tactical nuclear weapons in Ukraine, tacitly acknowledging that such a scenario would trigger nuclear war, which it says "should never be unleashed."

The Group of Seven warns Russia against, what it calls, potential use of non-conventional weapons in Ukraine.

Palestinian foreign minister Riyad al-Maliki says Israel must join the Nuclear Non-Proliferation Treaty (NPT) and eliminate its stockpile of nuclear arms.

Russia slams rapid deployment of modernized US B61 tactical nuclear weapons at NATO bases in Europe, saying the move would lower the "nuclear threshold."

The Russian president warns the world is facing the most dangerous decade since World War II.

A senior US military official says Washington has "no indication" Russia has decided to employ nuclear weapons in Ukraine.

EU foreign policy chief Josep Borrell has warned Russia that its army would be "annihilated" by the US-led military alliance if uses nuclear weapons against Ukraine.

US Defense Secretary Lloyd Austin has warned that there is no one to stop Russian President Vladimir Putin from following through on his recent threats of using nuclear weapons.

US defense chief insists Russia will not use nukes in Ukraine despite threats to do so if attacked.

Russia says US assumptions about the possibility of a limited nuclear conflict are “erroneous,” warning that any use of nuclear weapons could result in a global catastrophe.