GOMA, Congo (AP) — Islamic State-backed rebels attacked a Catholic church in eastern Congo on Sunday, killing at least 34 people, according to a local civil society leader.

A rebel group tied to the Islamic State claimed responsibility Monday for the massacre of dozens of Catholic worshippers in the Congo, according to Reuters. The rebel group, identified as the Allied Democratic Forces (ADF),

BBC reported that members of the Allied Democratic Forces (ADF) stormed a church in the town of Komanda, where they shot and killed the worshippers, then looted and set fire to nearby businesses.