US secretary of state Antony Blinken says that Ukrainian forces had made a major breakthrough in their counter-offensive against Russian troops, although he said it was too early to predict the outcome. "Clearly we've seen significant progress by the Ukrainians, particularly in the northeast, and that is a product of the support we've provided, but first and foremost it's a product of the extraordinary courage and resilience of the Ukrainian armed forces and the Ukrainian people," says Blinken. IMAGES AND SOUNDBITES