Biden gives Zelensky the green light to fire long-range American missiles into Russia for the first time

President Joe Biden has lifted that ban on Ukraine's use of US-supplied long-range missiles meaning the war-torn country can now strike deep inside Russia, sources say. 

The decision is a major US policy shift and comes as Biden is about to leave office and President-elect Donald Trump has pledged to limit American support for Ukraine and end the war as soon as possible.

US officials briefed the New York Times on the move in the wake of one of Russia's biggest aerial bombardments of Ukraine in the war on Saturday night.