Serbian tanks on the move RELATED VIDEO Watch video that NATO says shows targets being hit Windows Media 28K 80K 1.8M / 21 sec. / 240x180 QuickTime movie   To view the latest video streams on the strikes in Yugoslavia, use the arrow buttons below to scroll through the video gallery.  ALSO: Pentagon: 'We have made progress' Greeks angered by NATO strikes clash with riot police Security Council rejects Russian call to halt bombing Russia expels NATO staff; Greece calls for bombing halt Serb attacks reported on Kosovo villages NATO: Yugo ground troops may be targeted Poll: Americans split on NATO airstrikes IMAGE GALLERY: NATO strikes Yugoslavia: Day One  MESSAGE BOARD Crisis in Kosovo

March 27, 1999
Web posted at: 6:30 a.m. EST (1130 GMT)

BELGRADE, Yugoslavia (CNN) -- NATO attacks on Yugoslavia are expected to shift toward ground forces Saturday after three days of strikes targeting air defenses were declared a success.

In Bosnia- Herzegovina Saturday, air raid sirens sounded shortly before 11:30 a.m. (Bosnia time) Saturday on a U.S. airbase in Tuzla.

CNN's Tom Mintier reported from the base that U.S. personnel he accompanied were ordered into bunkers.

The sirens stopped sounding after a few minutes, but it was not clear if there was any immediate threat to the base.

U.S. forces are in Bosnia as part of a NATO-led peacekeeping force known as the Stabilization Force (SFOR).

Serb security forces have continued to push into Kosovo since the NATO attack began. According to many reports, the Serbian military has launched continuing assaults against Kosovar Albanian guerrillas and civilians.

In an interview with CNN, Gen. Wesley Clark, NATO's supreme commander, confirmed NATO would go after Serb troops. He said the current campaign was "systematically and progressively" degrading the Serb military capability and that troop columns would find themselves under attack.

Asked about reports that Serb troops were burning villages and abducting Kosovar Albanian leaders, Clark said, "It was always understood we weren't going to stop actions by paramilitary forces in Kovoso."

At the Pentagon, spokesman Ken Bacon said NATO was continuing to mount a heavy assault against Yugoslav President Slobodan Milosevic's air defense, but was "gradually increasing" air strikes on his troops and Serb police in Kosovo.

He said NATO bombs and missiles had struck an array of targets, including an ammunition dump, a fuel supply depot, police headquarters and an army command post.

"We believe certainly hitting their supplies -- their fuel and ammo supplies -- will have a demoralizing impact, as well as a debilitating impact on their ability to operate," Bacon said.

A NATO commander in Brussels said the attacks were "systematically taking out the meat" of the Yugoslav air defense system.

A single Tomahawk cruise missile was fired from the USS Philippine Sea in the Adriatic Sea Friday afternoon -- marking the first daylight attack on Yugoslavia.

Pentagon sources told CNN the missile was a strike of opportunity because a MiG-29 was spotted parked on a Yugoslav airfield. The cruise missile hit the jet, the sources said.

That brings the total of destroyed MiG-29s to six. NATO has said it shot down three other MiG-29s during the first day of Operation Allied Force.

And during an air clash over Bosnia-Herzegovina, Bacon said American F-15C fighters shot down two MiG-29s around 5:35 p.m. local time (11:35 a.m. EST).

He said it was not immediately clear why the jets entered Bosnian airspace. NATO spokesman Jamie Shea called it an "extremely desperate and foolish act" by Milosevic that was "met with a just response."

He suggested Milosevic may be trying to broaden the conflict by targeting NATO peacekeeping forces stationed in neighboring Bosnia.

Yugoslavia denied the claim with Foreign Minister Zivadin Jovanovic telling CNN the reports were an attempt by NATO to "invent losses of Yugoslav airplanes over Bosnia."

"We are not looking to attack any neighboring country nor to aggress anybody else. We are happy not to be aggressed," he said.

Asked if the reported shoot-down did not happen, Jovanovic said, "That's right."

Javier Solana

But as NATO continued its battle against Serb aggression in Kosovo, a split in solidarity emerged in the 19-member NATO security grouping.

Greece has suggested NATO attacks should now be suspended so talks could resume, while Italy has called for a "brief" military action..

However, NATO Secretary General Javier Solana said after a member meeting in Brussels, Belgium on Friday that all NATO members were united in continuing with military action against Yugoslavia.

Jovanovic also said his country has been discussing "with friendly countries," including Russia, about "assistance to reinforce our defense."

U.S. officials tell CNN they were aware Yugoslav talks with Russian and Ukrainian officials had taken place, but there is no reason to believe either country would break the arms embargo against Yugoslavia.

In the third night of attacks Friday, witnesses said more than 10 explosions shook an area east of Belgrade at about 10:45 p.m. local time (4:45 p.m. EST). Flames of large fires could be seen against the night skyline, casting an orange glow over the city.

"It's like day in Belgrade now," said Serb politician Zoran Popovic, describing the devastation to CNN.

Popovic said he had reports that a military barracks and a pharmaceutical plant had been hit. He said "outgoing toxic material" was coming from the plant and that local television and radio were telling residents to "go to shelters to put on gas masks."

However, Pentagon sources told CNN the fumes were likely to be a result of a strike on a Yugoslav rocket factory where gases used as rocket propellants were stored.

Military action appears set to continue through the weekend with U.S. President Bill Clinton canceling a trip to America's West Coast Saturday in favor of remaining in Washington to monitor the crisis in Kosovo which is dominated by U.S. forces.

NATO member Britain vowed Friday to stop "Milosevic's murder machine" unless the Serb president ends his crackdown against ethnic Albanians in Kosovo.

Russia, which has repeatedly protested any military action over Kosovo, put its foot down Friday. Russian Foreign Minister Igor Ivanov said NATO representatives in Moscow were told to leave the country.

But in a diplomatic blow to Russia, the United Nations Security Council failed to pass a resolution Friday on NATO bombings.

The Russian-sponsored resolution called for an immediate end to NATO's action and urged the resumption of negotiations to end the separatist conflict. It was rejected by a vote of 12-3, with only Russia, China and Namibia voting in favor of the resolution.

British Air Commodore David Wilby, speaking at a NATO news conference in Brussels earlier Friday, said that in the first two waves of NATO bombings, 50 Serbian military targets were hit.

Those included air defense facilities in Novi Sad and Batajnica in Serbia and Podgorica in Montenegro. The republics of Serbia, where Kosovo province is located, and Montenegro are what remain of the former Yugoslavia.

"On the operational front, we continue our attacks on the Federal Republic of Yugoslavia's air defense system," Wilby said, adding that the missions flown so far had been successful.

Correspondents Chris Burns, Carl Rochelle and Jamie McIntyre contributed to this report.

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