Islamic State has claimed responsibility for twin bombings that killed at least 20 people during a Catholic Church service in the Philippines, the militant group's news agency Amaq says.
The attack on Sunday on a predominantly Muslim island in the country's volatile south wounded 81 people, and was one of the deadliest in recent years in a region long plagued by instability.
The first explosion went off inside the cathedral on Jolo Island in Sulu Province, and was followed by a second blast outside, which was detonated as security forces raced to the scene, officials said.
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