Kosovo Albanian leaders will immediately start talks with their Western backers on steps leading to a declaration of independence and subsequent international recognition, a senior official said on Monday.

Russia warned the West on Monday that recognizing a unilateral declaration of independence (UDI) by Kosovo could set off a “chain reaction” of problems in the Balkans and beyond.

More NATO troops may be needed in Kosovo as the breakaway Serbian province moves towards independence, British Foreign Secretary David Miliband said on Monday.