Saturday, March 27, 1999 Published at 22:18 GMT
Nato steps up raids
Kosovo Albanian refugees are fleeing into neighbouring Macedonia
Nato forces have been authorised to attack a broader range of targets inside Yugoslavia.
As many as 30,000 refugees are believed to be stranded without shelter inside the province, with thousands more crossing into neighbouring Albania and Macedonia.
Up to now the air attacks have been aimed at the control and supply centres that make up Yugoslavia's air defence systems.
A Nato statement said the decision was approved by all the allied countries involved.
BBC Defence Correspondent Mark Laity says the decision involves risk, as Nato aircraft will have to fly lower to hit their targets.
The Nato statement insisted it was not at war with Yugoslavia, and said President Slobodan Milosevic could halt the air raids by agreeing to international demands on Kosovo.
UK Prime Minister Tony Blair has pledged to increase Britain's air power contribution to the Nato air strikes.
Mr Blair made this promise during a conversation with United States President Bill Clinton, the prime minister's office said.
Fourth day of attacks
A senior Nato official in Washington said strikes began on Saturday with a Tomahawk cruise missile launched onto the vicinity of the capital, Belgrade.
US officials later reported that American warships in the Adriatic had launched two Tomahawk missiles in daylight.
Witnesses reported scores of people rushing to bomb shelters after the sirens sounded and the explosions began.
Concern over 'atrocities'
Nato members said reports of Serb atrocities in Kosovo had only strengthened their resolve to continue the air strikes on Yugoslavia.
"These are extremely worrying indications," he said.
Other unconfirmed reports of mass killings by Serb forces have been emerging.
Kosovo Liberation Army (KLA) sources were reported as saying on Saturday that Serb paramilitary gangs had slaughtered several hundred Kosovo Albanians in Djakovica overnight.
'Stay the course'
His comments were echoed by UK Prime Minister Tony Blair, who said Nato air strikes were "the only chance of securing an end to this brutality" in Kosovo.
Yugoslav President Slobodan Milosevic appeared unbowed as a fourth day of air raids got under way. He said Nato "despotism" must be resisted.
Serbian officials said the KLA had stepped up its attacks on Serb forces in Kosovo.