Developments in the battle between the Philippine military and rebel groups have engulfed the nation deeper in conflict.

The Philippine armed forces have launched a helicopter airstrike as part of their ongoing assault at Muslim rebels occupying parts of a major southern city, stepping up efforts to end an eight-day standoff that has left dozens dead.

Two air force helicopters fired rocket rounds towards Moro National Liberation Front (MNLF) rebels held up in coastal villages in Zamboanga city on Monday, the military said.

"This is a precision close air support directed by ground troops to suppress the enemy," miliary spokesman Lieutenant Colonel Ramon Zagala told AFP.

The helicopter assault was the first air strikes since troops began their offensive on Friday to defeat the MNLF forces, who have been using civilians as human shields.

Asked about the potential for the civilians to be caught up in the helicopter assaults, Zagala emphasised they were "precision" strikes.

Zagala said earlier on Monday up to 100 MNLF rebels were still engaged in ground battles with troops around the two coastal villages, a week after the guerrillas invaded Zamboanga to stake an independence claim.

Zagala said the rebels were defiant in the face of the military advance.

"They still have ammunition and they continue to fire at us," armed forces spokesman Lieutenant Colonel Ramon Zagala said from Zamboanga, but insisted a military offensive was succeeding.

"We know for a fact that the end is near and they are trying to flee. Some of them may be trying to disguise as civilians, so it's very critical that the village elders help us identify those who are not from their neighbourhoods."

The latest violence in Zamboanga has left 51 MNLF fighters, six security forces dead and four civilians dead, according to Zagala.


Fighting continues

Last Monday armed MNLF forces entered the port city's coastal neighbourhoods in an effort to sabotage talks between the rival rebel group the Moro Islamic Liberation Front (MILF) and the government that are aimed at ending decades of conflict citing the talks are not inclusive.

The rebels initially took dozens of hostages and burned hundreds of homes, forcing a shut down of Zamboanga, a city of about one million that is a key commercial hub in the region. An undetermined number of hostages are being used as human shields.

Nearly 70,000 people have already fled the fighting, and international humanitarian agencies have rushed aid.

The MNLF waged a 25-year guerrilla war for independence before signing a peace treaty in 1996 that granted limited self-rule to the south's Muslim minority.

Muslim rebels have been fighting since the 1970s for an independent or autonomous homeland in south of the mainly Catholic Philippines. An estimated 150,000 people have died in the fighting.


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