Armed men have stormed a mosque in Nigeria’s Katsina state during morning prayers, killing at least a dozen people. Officials say the assault may have been a reprisal following earlier clashes.

The attack came days after both town residents and the Nigerian military were reported to have targeted armed group members. The Reuters news agency reported that at least 27 worshippers had been killed in the mosque attack.
Source: https://www.dw.com/en/nigeria-gunmen-kill-worshippers-in-katsina-mosque-attack/a-73696588