MANILA, NOV. 6 -- A top spokesman for the outlawed Communist Party accused the U.S. government today of "meddling" in the counterinsurgency campaign here, and he warned that the United States might "pay a high price for its political-military intervention in terms of American lives and property."

The statement, coming from the communists' most authoritative spokesman, appeared to signal a decisive shift of policy for the rebels, marking the first time in the 19-year history of the insurgency that a top communist leader has specifically mentioned Americans in the Philippines as "targets for attack."

In a one-page, typewritten statement distributed to news agencies, Saturnino Ocampo, a top leader of the National Democratic Front, said, "The revolutionary forces assert the right to defend themselves and the Filipino people against U.S. armed intervention."

Ocampo added, "All U.S. military and civilian officials and personnel involved in carrying out the 'total war,' whether as advisers, intelligence operatives, action agents or in any other function, are therefore targets for attack."

{In Washington, State Department spokesman Charles E. Redman said, "We take all such statements seriously." He said the U.S. Embassy is continuing its practice of advising Americans "to take all necessary security precautions."}

The National Democratic Front is the front group for both the Communist Party of the Philippines and its military wing, the New People's Army. Ocampo was one of three communist representatives who negotiated a 60-day cease-fire with the Philippine government, and he is believed to be a member of the party's Central Committee. His statements in the past have appeared to represent official party policy.

Ocampo's statement, which appeared to be authentic, made no mention of the murders of three American servicemen Oct. 28 outside Clark Air Base, which houses the U.S. 13th Air Wing.

Communist guerrillas have been widely suspected of being behind those slayings, although analysts and officials here cautioned that the murders could also have been the work of right-wing military officers out to destabilize the government of President Corazon Aquino.

In previous statements, Ocampo and other communist officials have generally said U.S. officials and military personnel here would not be targeted because there was no evidence that Americans were directly involved in the government's drive against the insurgency.

However, recent stepped-up criticisms of the American government from lower-level communist officials and in the party Central Committee's monthly newsletter Ang Bayan (Our Country) have suggested that this policy was about to change.

The rebels appear to be angered by the U.S. government's escalated delivery of weapons and supplies to the Philippine military.

Shortly before the three U.S. servicemen were slain at Clark, the U.S. government turned over to the Philippines 10 V150 armored personnel carriers. More recently, 100 radios, 150 new trucks and 61,000 pairs of combat boots have been delivered. U.S. Ambassador Nicholas Platt told reporters Oct. 23 that "we're trying to speed up the delivery of this equipment."

Ocampo, in his statement, criticized the Pentagon, the Central Intelligence Agency and the State Department for "mercilessly pushing to intensify the level of violence inflicted upon our people."

He also accused Aquino of "brazen collaboration with the U.S. interventionists, in total disregard of the tragic consequences and the nation's sovereign rights."

There has also been growing concern here, voiced mainly by congressional leaders, that American soldiers might be inadvertently drawn into combat with guerrillas as the Americans conduct patrols in combat gear around the periphery of the bases.

The U.S. Embassy here had no initial comment on the latest statement, but a spokesman said, "Any time American citizens' lives are threatened, we take it seriously."

The embassy has been advising Americans to exercise extreme caution and to stay away from Manila's notorious Ermita tourist belt and particularly the bars frequented by foreigners.

Americans at Clark continue to be restricted to the base except for the most essential travel. The base's spokesman, Maj. Thomas Boyd, said on armed forces television tonight that the restrictions will remain in effect over the weekend.

At Subic Bay Naval Station, in Olongapo, the travel restrictions were eased yesterday to allow sailors from the U.S. aircraft carrier Midway to roam the city's bars. The sailors were told not to venture off the main street, heavily guarded by Philippine troops.