Latest developments Saturday related to Kosovo:

_ NATO airstrikes demolish a second major bridge across the Danube river in Novi Sad, Yugoslavia's second-largest city, state-run Serbian television said. In an expansion of the campaign, strikes before dawn hit the heart of central Belgrade, destroying the Yugoslav and Serb Interior Ministry buildings. Bad weather continues to hamper the air campaign.

_ With Kosovo's neighbors facing a humanitarian disaster, NATO Secretary General Javier Solana says an alliance-led protection force could go into Kosovo to return ethnic Albanian refugees ahead of any signing by Yugoslavia of a peace agreement. Such a plan would be a change in earlier policy that Belgrade must first assent to a NATO deployment. An alliance official underlines that NATO ground forces are not preparing to invade Kosovo, and the United States says its position has not changed.

_ NATO plans to send a force of about 6,000 troops to Albania to help in a mounting relief effort for more than 100,000 refugees there.

_ Macedonia says it will no longer allow Kosovo refugees through its borders unless they continue on to third countries. Officials fear ``the security situation in the country could be seriously endangered.'' About 65,000 Kosovo Albanians are trapped in cold, muddy fields at the border without provisions, waiting entry.

_ Germany announces it will accept some Kosovo refugees and will urge other European countries to do the same. NATO countries plan to airlift 1 million military meals, 187,000 blankets and drinking water to Macedonia for refugees.

_ Yugoslav Foreign Minister Zivadin Jovanovic refers to three U.S. soldiers captured this week as prisoners of war, the most authoritative reference yet by a top Yugoslav official to the term that confers on them protected status under the Geneva Conventions on the conduct of war.