Militant Islamic group says it 's behind three attacks Sunday in cities of Zaria and Kaduna . The Nigerian government has blamed Boko Haram for the latest attack on a police station in Nigeria's capital Abuja. A week ago , a car bomb killed five people during services at a church in Jos , also in northern Nigeria . Boko Haram says the bombings were retaliation for attacks on mosques .
Militant Islamic group says it 's behind three attacks Sunday in cities of Zaria and Kaduna . The Nigerian government has blamed Boko Haram for the latest attack on a police station in Nigeria's capital Abuja. Boko Haram says the bombings were retaliation for attacks on mosques .