Two bombs blamed on the Islamic extremist group Boko Haram exploded at a crowded mosque and a posh Muslim restaurant in Nigeria’s central city of Jos, killing 51 people, officials said Monday. The blasts on Sunday night came hours after a woman suicide bomber blew up at a crowded evangelical Christian church service in the northeastern city of Potiskum, killing six people, according to witnesses. Also Sunday, extremists returned to northeastern villages attacked three days earlier, killing nine villagers and burning down 32 churches and about 300 homes, said Stephen Apagu, chairman of a self-defense group in Borno state’s Askira-Uba local government area. He said the militia killed three militants.

Sunday’s attacks are the latest in a string blamed on Boko Haram that have now killed about 300 people in the past week. In the most deadly, more than 140 people were killed, most men and boys as they prayed in mosques in northeastern Kukawa town on Wednesday.