A suicide car bomber detonated his explosives Sunday outside a church in central Nigeria as gunmen attacked another church in the nations northeast,killing at least six people and wounding dozens of others in the latest attacks targeting Christian worshippers in a nation increasingly divided by faith,officials and witnesses said. A radical Islamist sect known as Boko Haram claimed the attacks. The violence Sunday in Jos and Biu,a city in hard-hit northeastern Borno state,comes as almost every weekend this year has seen churches targeted by Boko Haram. In Jos,a city on the uneasy dividing line between Nigeria's largely Muslim north and Christian south,the suicide car bomber drove toward the compound of the Christ Chosen Church of God in the city and detonated his bomb nearby,said Abu Emmanuel,a spokesman for Plateau state police. Angry youths later surrounded the area,striking back against Muslims in retaliatory violence,witnesses said. Four people and the suicide bomber were killed,while more than 40 others were wounded. Meanwhile in Biu,a city in northeast Nigerias Borno state,gunmen opened fire during a service at an EYN church,an acronym that means Church of the Brethen in Nigeria in the local Hausa language of Nigeria's north,witnesses said. An usher and another worshipper at the church were killed in the attack while others were injured.