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Residents try to put out a fire that gutted several homes while government troopers continue their assault on Muslim rebels Thursday, Sept. 12, 2013, in Zamboanga city in the southern Philippines. (AP Photo/Bullit Marquez) ( APTOPIX Philippines Rebel Standoff )

A sick resident is evacuated from burning houses during a fire fight between government forces and Muslim rebels as stand-off entered its fourth day in Zamboanga City on the southern island of Mindanao on September 12, 2013. AFP PHOTO/TED ALJIBE/AFP/Getty Images ( 522823529 )

Philippine soldiers fire towards enemy position during a fire fight between government forces and Muslim rebels as stand-off entered its fourth day in Zamboanga City on the southern island of Mindanao on September 12, 2013. AFP PHOTO/TED ALJIBE/AFP/Getty Images ( 522822739 )

A resident holds his head as a fire continues to raze several homes while government troopers continue their assault on Muslim rebels Thursday, Sept. 12, 2013, in Zamboanga city in the southern Philippines. The troops have surrounded the Moro National Liberation Front guerrillas with their hostages in four coastal villages since the crisis erupted Monday. (AP Photo/Bullit Marquez) ( APTOPIX Philippines Rebel Standoff )

Government troopers fire their weapons as they continue their assault at Muslim rebels Thursday, Sept. 12, 2013 in Zamboanga city in southern Philippines. (AP Photo/Bullit Marquez) ( Philippines Rebel Standoff )

Government troopers fire their weapons as they continue their assault on Muslim rebels Thursday, Sept. 12, 2013, in Zamboanga city in the southern Philippines. (AP Photo/Bullit Marquez) ( APTOPIX Philippines Rebel Standoff )

Government troopers continue their assault on Muslim rebels Thursday, Sept. 12, 2013, in Zamboanga city in the southern Philippines. (AP Photo/Bullit Marquez) ( APTOPIX Philippines Rebel Standoff )

A resident looks at burning houses during a fire fight between government forces and Muslim rebels as stand-off entered its fourth day in Zamboanga City on the southern island of Mindanao on September 12, 2013. AFP PHOTO/TED ALJIBE/AFP/Getty Images ( 522825960 )

Government troopers aboard an Armored Personnel Carrier fire at Muslim rebels in an operation to rescue scores of hostages being held by the rebels, Thursday Sept. 12, 2013, in Zamboanga city in the southern Philippines. (AP Photo/Bullit Marquez) ( Philippines Rebel Standoff )

Members of the Philippine national police special forces take cover as they move forward to enemy positions among burning houses during a fire fight with Muslim rebels, as a stand-off entered its fourth day in Zamboanga City on the southern island of Mindanao on September 12, 2013. AFP PHOTO/TED ALJIBE/AFP/Getty Images ( 522823527 )

Fresh troops arrive to reinforce other government troopers as they continue their assault on Muslim rebels holding scores of hostages Thursday, Sept. 12, 2013, in Zamboanga city in the southern Philippines. (AP Photo/Bullit Marquez) ( Philippines Rebel Standoff )

Several houses are gutted by fire as government troopers continue their assault at Muslim rebels Thursday, Sept. 12, 2013 in Zamboanga city in southern Philippines. (AP Photo/Bullit Marquez) ( Philippines Rebel Standoff )

A Government trooper aims his rifle in a continuing operation to rescue scores of hostages being used as human shields by Muslim rebels on the fourth straight day Thursday, Sept. 12, 2013 at Zamboanga city in southern Philippines. (AP Photo/Bullit Marquez) ( Philippines Rebel Standoff )

Fresh troops arrive to reinforce other government troopers as they continue their assault at Muslim rebels Thursday, Sept. 12, 2013 in Zamboanga city in southern Philippines. (AP Photo/Bullit Marquez) ( Philippines Rebel Standoff )

Government troopers gather for a last-minute instruction before heading out to rescue scores of hostages being used as human shields by Muslim rebels on the fourth straight day Thursday, Sept. 12, 2013 at Zamboanga city in southern Philippines. (AP Photo/Bullit Marquez) ( Philippines Rebel Standoff )

Government troopers continue their assault on Muslim rebels Thursday Sept. 12, 2013, in Zamboanga city in the southern Philippines. (AP Photo/Bullit Marquez) ( Philippines Rebel Standoff )

Government soldiers take cover from rebel's sniper fire during heavy fighting between rebels and government forces as the stand-off enter its fourth day in Zamboanga City, in southern island of Mindanao, on September 12, 2013. AFP PHOTO/TED ALJIBE/AFP/Getty Images ( 522815770 )

Residents try to put out fires in their homes during a fire fight between government troops and Muslim rebels in Zamboanga City, on the southern island of Mindanao on September 12, 2013. AFP PHOTO/TED ALJIBE/AFP/Getty Images ( 522825963 )

Philippine soldiers aim their rifles at enemy positions during a fire fight with Muslim rebels in Zamboanga City in southern island of Mindanao on September 12, 2013. AFP PHOTO/TED ALJIBE/AFP/Getty Images ( 522819623 )

Philippine soldiers look at enemy positions as they try to protect residents putting out fires in their homes during a fire fight with Muslim rebels in Zamboanga City, in southern island of Mindanao on September 12, 2013. AFP PHOTO/TED ALJIBE/AFP/Getty Images ( 522819658 )

A fireman walks past burning houses during a fire fight between government forces and Muslim rebels as stand-off entered its fourth day in Zamboanga City on the southern island of Mindanao on September 12, 2013. AFP PHOTO/TED ALJIBE/AFP/Getty Images ( 522822731 )

A sick resident is evacuated from burning houses during a fire fight between government forces and Muslim rebels as stand-off entered its fourth day in Zamboanga City on the southern island of Mindanao on September 12, 2013. . AFP PHOTO/TED ALJIBE/AFP/Getty Images ( 522822634 )

A Philippine soldier guides a fire truck to burning houses during a fire fight between government forces and Muslim rebels as stand-off entered its fourth day in Zamboanga City on the southern island of Mindanao on September 12, 2013. AFP PHOTO/TED ALJIBE/AFP/Getty Images ( 522822652 )

Philippine soldiers fire at rebels' position among burning houses (back) during a fire fight between government forces and Muslim rebels as stand-off entered its fourth day in Zamboanga City on the southern island of Mindanao on September 12, 2013. AFP PHOTO/TED ALJIBE/AFP/Getty Images ( 522822734 )

Philippine soldiers supported by an armored personnel carrier fire towards enemy position during a fire fight between government forces and Muslim rebels as stand-off entered its fourth day in Zamboanga City on the southern island of Mindanao on September 12, 2013. AFP PHOTO/TED ALJIBE/AFP/Getty Images ( 522822854 )

Philippine soldiers fire towards enemy position during a fire fight between government forces and Muslim rebels as stand-off entered its fourth day in Zamboanga City on the southern island of Mindanao on September 12, 2013. AFP PHOTO/TED ALJIBE/AFP/Getty Images ( 522822835 )

Members of Philippine national police special forces arrive to reinforce soldiers during a fire fight between government forces and Muslim rebels as stand-off entered its fourth day in Zamboanga City on the southern island of Mindanao on September 12, 2013. AFP PHOTO/TED ALJIBE/AFP/Getty Images ( 522822839 )

A Philippine soldier mans a machine gun inside an armored personnel carrier during a fire fight between government forces and Muslim rebels as stand-off entered its fourth day in Zamboanga City on the southern island of Mindanao on September 12, 2013. AFP PHOTO/TED ALJIBE/AFP/Getty Images ( 522822830 )

A Philippine soldier fires his M-16 rifle at rebels' snipers as another soldier covers his ears during a fire fight between government forces and Muslim rebels as stand-off entered its fourth day in Zamboanga City on the southern island of Mindanao on September 12, 2013. AFP PHOTO/TED ALJIBE/AFP/Getty Images ( 522822845 )

Philippine soldiers peer through holes of a wooden house as they observe enemy movements during a fire fight between government forces and Muslim rebels as stand-off entered its fourth day in Zamboanga City on the southern island of Mindanao on September 12, 2013. AFP PHOTO/TED ALJIBE/AFP/Getty Images ( 522823329 )

Residents using pails douse their burning houses with water during a fire fight between government forces and Muslim rebels as stand-off entered its fourth day in Zamboanga City on the southern island of Mindanao on September 12, 2013. AFP PHOTO/TED ALJIBE/AFP/Getty Images ( 522823346 )

Residents (L) evacuate as soldiers take cover from sniper fire during a fire fight between government forces and Muslim rebels as stand-off entered its fourth day in Zamboanga City on the southern island of Mindanao on September 12, 2013. AFP PHOTO/TED ALJIBE/AFP/Getty Images ( 522823354 )

A Philippine soldier peers from bullet-riddled window of their armored car personnel after it was hit by Muslim rebels sniper fire during a fire fight between government forces and Muslim rebels as stand-off entered its fourth day in Zamboanga City on the southern island of Mindanao on September 12, 2013. AFP PHOTO/TED ALJIBE/AFP/Getty Images ( 522823360 )

A partially burned pet cat (front) runs away from burning houses during a fire fight between government forces and Muslim rebels as stand-off entered its fourth day in Zamboanga City on the southern island of Mindanao on September 12, 2013. AFP PHOTO/TED ALJIBE/AFP/Getty Images ( 522825957 )