The United States said on Monday it was Russia that is escalating the conflict in Ukraine by deploying North Korean troops, after the Kremlin warned that Washington would deepen its involvement in the war by allowing Kyiv's forces to strike far into Russia with U.

Fox News chief national security correspondent Jennifer Griffin provides details on President Biden's decision to authorize Ukraine to use U.S. missiles against Russia.

President Joe Biden's apparent green light for Ukraine to strike Russia with US-made long-range missiles has caused consternation among Donald Trump's allies. Trump himself has not commented, but he won the election after promising to end the war - and people close to him have condemned the move as dangerous escalation.

The attack came as fears are mounting about Moscow’s intentions to devastate Ukraine’s energy capacity before winter.

Russian forces have launched a large-scale missile attack on Ukraine's power grid, targeting power generation and transmission facilities across Ukraine. Source: Ukraine's Energy Minister Herman Halushchenko on Facebook Quote: "The transmission system operator [Ukrenergo] has urgently introduced emergency power outages.

Russia unleashed its largest air strike on Ukraine in almost three months on Sunday, launching 120 missiles and 90 drones that killed at least seven people and caused severe damage to the power system,