Best Gore member @chowdog has the backstory:
This American man is a tourist in Siargao, an island in southern Tacloban in Surigao Del Norte, the Philippines. Based on the news, he was just chilling out there and there’s a Brgy. Tanod (its like a police, I don’t know the term in English) beating a teenager kid. He protected the kid and yeah, he got hit by a tyrant officer in the head.
As can be seen from the pics, the man got his forehead split, presumably with a baton.
Many thanks for the pics, @chowdog: