I found an interesting article on The Telegraph (UK) that states that
because of the sounds of gun fire "aid agency convoys need to wait for the army to restore a semblance of order before leaving their warehouses."
There are 3.9 million guns - legal and illegal - held by civilians in the Philippines, or about 4.7 per 100 people, which isn't that high in global terms. But people are prepared to use them. The murder rate is among the highest in Asia and three times that of the United States, at 8.9 homicides per 100,000.
There is a strong gun culture in the Philippines:
Guns are so common that shops, restaurants and malls in cities commonly display signs asking customers not to bring their weapons inside. All private security guards carry either handguns or shotguns, or both.
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