Factbox-What is Nigeria’s violent Islamist sect Boko Haram?

March 16, 2012

(A car burns at the scene of a bomb explosion at St. Theresa Catholic Church at Madalla, Suleja, just outside Nigeria's capital Abuja, December 25, 2011. The Islamist militant group Boko Haram claimed responsibility. REUTERS/Afolabi Sotunde )

Special Report: Nigeria’s Boko Haram – between rebellion and jihad

January 31, 2012

(A man walks through the ruins of a zonal police headquarters after a bomb attack in Nigeria's northern city of Kano, January 21, 2012. REUTERS/Stringer)

Nigeria’s President Jonathan tells Boko Haram Islamists to come out and talk

January 26, 2012

(Emir of Kano Ado Bayero (R) welcomes President Goodluck Jonathan during his visit to the northern city of Kano January 22, 2012, following bomb attacks that took place on Friday. REUTERS/Stringer)

Nigerian police find bomb-filled cars in Kano after Boko Haram attacks killed 178

January 23, 2012

(Red Cross officials load bodies into a truck in Nigeria's northern city of Kano January 21, 2012. REUTERS/Stringer)

Nigeria’s radical Islamist Boko Haram ups it’s game, but it’s not Al Qaeda

January 18, 2012

(Security forces view the scene of a bomb explosion at St. Theresa Catholic Church at Madalla, Suleja, just outside Nigeria's capital Abuja, December 25, 2011. REUTERS/Afolabi Sotunde)

Leader of violent Nigerian Islamist group defends killing Christians in video

January 11, 2012

(A victim lies on the ground after a bomb attack in Abuja in this December 25, 2011 still image taken from video. Islamist militant group Boko Haram said it planted bombs that exploded on Christmas Day at churches in Nigeria, one of which killed at least 27 people on the outskirts of the capital. REUTERS/via Reuters TV)

Nigeria’s Boko Haram Islamists have support in gov’t, President Jonathan says

January 9, 2012

(A member of the clergy guides security forces through the scene of a car bomb explosion at St. Theresa Catholic Church at Madalla, Suleja, just outside Nigeria's capital Abuja, December 25, 2011. REUTERS/Afolabi Sotunde)

Nigeria’s Jonathan declares state of emergency against Islamist insurgency

January 2, 2012

(Nigerian President Goodluck Jonathan (C, with black hat) visits St. Theresa's Catholic church, the scene of a Christmas day bomb attack, just outside the capital Abuja, December 31, 2011. REUTERS/Afolabi Sotunde )

Insight: Islamist attacks strain Nigeria’s north-south divide

December 29, 2011

(A sign is seen at a police check point near the main market following recent violent clashes in Nigeria's central city of Jos February 15, 2011. REUTERS/Afolabi Sotunde)

Nigerian Christians warn of religious war after two dozen die in Christmas bombing

December 27, 2011

(A car burns at the scene of a bomb explosion at St. Theresa Catholic Church at Madalla, Suleja, just outside Nigeria's capital Abuja, December 25, 2011. REUTERS/Afolabi Sotunde)