Ten Philippines soldiers were killed by "friendly" fire in a military air raid during efforts to take back a southern city sieged by fighters, the defence minister said on Thursday.
"We have to do our part in sharing the heavy burden of what happened in Marawi City", Alvarez said before the 17th Congress adjourned sine die.
Military spokesman Restituto Padilla said an investigation would be held to establish how the air force plane killed ground troops.
Marawi Bishop Edwin de la Pena confirmed that it was Suganob in the video.
"I directed them to help in case somebody will ask for help", Balutan said. "If ISIS succeeds in making Marawi a caliphate, they can easily spread to other provinces".
"In the end their relatives and everyday people may be the ones who will kill them", he said. "They are in areas that they will never come out alive unless they surrender". "There have been organisations and civilians here who have been asking the government to stop the air strikes, simply because of the danger they pose for civilians".
On the same day, a bombing accident that was supposedly an air strike on the Islamist rebels took place in Marawi, killing 11 government troops.
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But Acmad Aliponto, a 56-year-old court sheriff who decided not to flee the city, said that while the militants were well-armed, he believes they have little local support, and that the recent violence could turn more people against them. "There's only one way, maybe coming from Indonesia or from Malaysia, Sabah", Lorenzana said. The president fears that the predominantly-Muslim southern Philippines could become a haven for extremists being driven out of Iraq and Syria.
Proclamation No. 216, the martial-law declaration in Mindanao, will last 60 days, according to Article VII, Section 18 of the Constitution, but Mr. Duterte said this will continue until security officials give assurance that the entire country is "safe".
Duterte declared martial law on the island on May 23 and has discounted negotiations.
It was sparked by the attempted capture of a top militant leader by the army.
Still, the fighters have turned out to be remarkably well-armed and resilient. Maria Christina Nobleza, who was caught for trying to help Abu Sayyaf member Reener Lou Dongon in Bohol, the investigators traced funds from overseas being channeled to the police officer. "So wherever they go, they go to Visayas or Luzon, we will arrest them wherever we find them", Lorenzana said. The bodies of 19 civilians have been recovered and local authorities have reported more civilian deaths still to be tallied.
Lorenzana also warned that many militants may have escaped, despite checkpoints throughout the city and surrounding it.
The government is concerned that the group's brazen attack and its resilience could strike a chord with the Islamic State leadership in the Middle East and win its endorsement as its Southeast Asian affiliate.