A suicide bombing in a church in the Nigerian village of Potiskum on Sunday that killed the priest and four congregants marked the end of a particularly violent week during which 200 people were killed in the African nation. No one has claimed responsibility for the church blast, but it is consistent with past attacks attributed to militant Islamist group Boko Haram, CNN reports. Potiskum has often been the focus of Boko Haram violence during the first half of 2015; in January, three people were killed and 43 hurt during a bombing in a market, and the next week another attack left four dead and 48 hurt at a bus station.