Ukrainian President Volodymyr Zelenskyy in an interview Friday warned that Russia could intensify its offensive and said Kyiv would only accept a "fair peace" despite the West's calls for a quick solution.

Zelenskyy also repeated pleas for allies to send more air defense and fighter jets and said the "biggest advantage" for Russia was a ban on Ukraine using Western-donated weapons to strike Russian territory.

With a mobilization law coming into force on Saturday, he admitted issues with staffing and "morale" in Ukrainian ranks, which have been often outgunned and outmanned as the third year of the war grinds on.