Ukraine has little more than 30 days left of fighting before the weather hinders its counter-offensive, the top-ranking US military officer says.
Speaking to the BBC's Sunday with Laura Kuenssberg programme, Gen Mark Milley said colder conditions would make it much harder for Ukraine to manoeuvre.
He admitted the offensive had gone more slowly than expected. But he said: "There's still heavy fighting going on.
"The Ukrainians are still plugging away with steady progress."
Gen Milley said it was too early to say whether the counter-offensive had failed, but said Ukraine was "progressing at a very steady pace through the Russian front lines".
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