At least 21 people were killed and 100 wounded during a series of church bombings in central Nigeria on Sunday. Radical Islamic rebel group Boko Haram claimed responsibility for the attack, its third consecutive Sunday attack on church services in as many weeks.

After the bombings, two of which occurred in the city of Zaria and one in Kaduna City, a mob of Christians in Kaduna state retaliated by killing more than 50 people.

Christian youths took to the main motorway that leads to the capital Abuja, attacking motorists who looked Muslim. Christian mobs carrying machetes and clubs were also prowling the streets of Kaduna city, the Express Tribune reported. Many of the victims of the riot were found burned to death.