Tuesday, October 13, 1998 Published at 06:36 GMT 07:36 UK
Countdown begins to Kosovo strikes
US bombers have arrived in the UK in case of air strikes
Nato announced a four-day delay before beginning any military operation, in order to allow time for the Kosovo crisis to be resolved diplomatically.
Mr Solana said the decision had been taken on the basis of a briefing by US special envoy to the Balkans Richard Holbrooke, who had reported progress due to Nato pressure during his days of shuttle diplomacy between Brussels and Belgrade.
The Yugoslav ambassador to the UN, Vladislav Jovanovic, said Nato had disregarded the authority of the UN Security Council.
"[Nato] has decided to act against a country which defends itself against terrorism and a separatist attempt to wrench an integral part of our territory out of Serbia and Yugoslavia," he said.
'A very big if'
"Faced with a solid international front, President Milosevic has made a series of commitments," Mr Clinton told a news conference in New York.
He said the Yugoslav president had agreed to withdraw Serb forces from Kosovo, and to allow 2,000 international observers to verify compliance on the ground. He said Mr Milosevic had also agreed to a timetable for discussions on autonomy for Kosovo.
"If achieved, and that is a very big if, these could achieve the international community's objectives."
But he warned: "Commitments are not compliance. Balkan graveyards are filled with President Milosevic's broken promises."
UN demands to Yugoslavia
The UN demands which Nato says Belgrade must meet in order to avoid military action are as follows:
Holbrooke back to Belgrade
These include how Belgrade's compliance with the settlement would be monitored. This task will probably be entrusted to civilians of the Organisation for Security and Cooperation in Europe, backed up by Nato aircraft.
Correspondents say Nato's decision to hold fire for 96 hours - twice as long as was earlier suggested - recognised gains made by Mr Holbrooke during the past few days of talks with President Milosevic, and the possibility of a peaceful settlement in the coming days.
Mr Holbrooke's hand will be strengthened, however, by Nato's decision to go ahead with the activation order.
The activation order is in effect a countdown to possible military action in four days' time. The order:
The BBC correspondent in Serbia reports that civilians there are preparing for war. Local authorities have been testing air-raid sirens and drawing up lists of air-raid shelters, and citizens are forming crisis committees and stockpiling food.