Abu Sayyaf commander Umbra Jumdail had deviated from the brutal image of his al-Qaida-linked militant group by playing doctor to poor Filipino villagers, whose backing he needed to stay safe from military troops. But those villagers may have been used by the military to finally track him down last week.

A U.S.-backed airstrike killed Jumdail, his son and several militants while they slept in huts or hammocks Thursday near Parang town on southern Jolo island, dealing the latest blow to the Abu Sayyaf and depriving it of a key leader.

Surviving militants suspect that villagers secretly working for the military helped track down Jumdail, said a Philippine military intelligence official who had been helping monitor the militants. The official said militants believe villagers pretending to seek medical treatment traveled to Jumdail's hideout and left some kind of sensor that the military used to target his Abu Sayyaf lair.

The impact of the blasts destroyed huts and toppled trees, including a mango tree that pinned Jumdail, said the official, who spoke on condition of anonymity because he was not authorized to talk to reporters.

Jumdail had harbored a top Southeast Asian terror suspect, Malaysian Zulkifli bin Hir, also known as Marwan. Among the FBI's most-wanted terrorists, Marwan, a U.S.-educated engineer, had been crucial in helping turn mostly desperate peasant recruits into Abu Sayyaf bombers and training them to carry out deadly attacks.

The Philippine military announced that the long-hunted Marwan and his Singaporean ally Abdullah Ali, better known as Muawiyah, were killed in the air raid along with Jumdail and other Filipino extremists. But two security officials said Sunday that new intelligence shows that Jumdail was killed but that the two foreign terror suspects are still alive and were not in the Abu Sayyaf lair that was bombed.

The military continues to insist that Marwan and Muawiyah are dead and are searching for their remains. Not a single body was retrieved by police in the bombed hilly jungle lair near Lanao Dakulah village, fueling different versions of who was killed.

Philippine officials, nevertheless, hailed Jumdail's death as the latest major blow to the Abu Sayyaf, which has carved its name in blood through bombings, kidnappings and beheadings. The extremist group is on Washington's list of terrorist organizations. The militants, currently estimated to number less than 400, have endured years of battle setbacks and the loss of key commanders.

"He had the charisma and was the real link used by foreign militants," military spokesman Col. Arnulfo Marcelo Burgos said of Jumdail. "He was a big loss."

Jumdail had taken a course related to medicine, enabling him to serve as a rebel medic who treated wounded comrades when he joined the Moro National Liberation Front, once the Philippines' largest Muslim separatist group.

He left the Moro group after it signed a 1996 peace pact with the government and eventually emerged as a commander of the violent Abu Sayyaf, which was organized by a Filipino militant after helping wage the anti-Soviet resistance in Afghanistan, according to Jumdail's former comrades. Continued...