Military checking again reports of Maute leader's death

Metro Manila (CNN Philippines, August 28) — With the Marawi siege ongoing for over three months, the military says they are receiving reports again that one of the two Maute brothers has been killed in action.

However, the Western Mindano Command (Westmincom) was quick to add that this was still for validation.

Lt. Gen. Carlito Galvez, Westmincom chief, said reports reached them that a certain "Omar" had been killed.

"We don't know (if that was) Omar Maute or another Omar," Galvez said.

This is not the first time that similar reports cropped up. In June and July, the military had also said the other Maute brother, Abdullah, may have been killed — although this was never confirmed.

There is also the possibility that both brothers have already slipped out of Marawi, the military said.

Either way, Galvez said, the ISIS-linked group is getting weaker.

Related: BJMP: Father of Maute brothers died in detention

He added that the military was not about to let their guard down, specially in the wake of the death of the Maute patriarch yesterday afternoon.

Galvez said they were expecting sympathetic attacks after the passing away of Cayamora Maute, who had been detained at Camp Bagong Diwa in Taguig City.

CNN Philippines' Rex Remitio contributed to this report.