STORY: Blinken, in Mexico for economic talks, was asked for his assessment of recent developments in Ukraine.

Ukrainian troops have recaptured dozens of towns in recent days, after Moscow abandoned its main bastion in northeastern Ukraine on Saturday marking its worst defeat since the early days of the war.

"What they have done is very methodically planned out and of course it's benefited from significant support from the United States and many other countries in terms of making sure that Ukraine has, in its hands, the equipment it needs to prosecute this counteroffensive," Blinken said.

Blinken said the conflict in Ukraine was likely to continue for some time as Russia still has very significant forces and arms in the country, which it is still using "indiscriminately" against civilians and civilian infrastructure.