A series of bomb blasts and shootings in northern Nigeria has killed at least 17 people, including five worshippers.
Attacks Claimed by Boko Haram
- July 2009 - Attacks and clashes in Bauchi and Maiduguri leave 800 people dead.
- December 2010 - Bombings in central Nigeria and church attacks in the northeast kill 86 people.
- June 16, 2011 - Car bomb kills two outside police headquarters in Abuja.
- June 26, 2011 - Attack on a bar in Maiduguri kills 25 people.
- August 25, 2011 - Attacks on a police station in Gombi and two banks leave 12 people dead.
- August 26, 2011 - Suicide bomber kills 23 people at the U.N. building in Abuja.
- November 4, 2011 - Bombings in Damaturu and Potiskum kill 65 people.
- December 25, 2011 - Christmas Day bombings across Nigeria kill 39 people.
- January 10, 2011 - Gunmen open fire on a bar in Yobe state, killing eight people.
At least 12 people were killed at police headquarters in Gombe, in the northeast. Police have not confirmed if all the victims were officers, but they do suspect members of the radical Islamic group Boko Haram are behind the attack. Authorities repelled a second attack at a prison.
Also Friday night, in the northwest city of Kano, police say gunmen on a motorcycle killed five worshippers at a mosque. No one has claimed responsibility, but officials believe Boko Haram is involved in the attack.
Boko Haram has waged violent attacks in its campaign to implement strict Islamic law across Nigeria, which is roughly divided between Muslims in the north and Christians in the south.
The radical group claimed responsibility for one of the deadliest attacks in Kano last month that killed 185 people. It also admitted to killing at least 44 people in a Christmas Day bombing at a Catholic church outside Abuja, Nigeria's capital.
Following the Christmas attack, President Goodluck Jonathan declared a state of emergency in areas hard hit by violence blamed on Boko Haram.
Mr. Jonathan said the measure impacted parts of Yobe and Borno states in the northeast, Plateau state in central Nigeria, and Niger state in the east.
He said the temporary closure of borders in those areas was necessary to address security challenges and restore normalcy to the country.
The opposition has criticized the Jonathan administration for failing to control Boko Haram.
Some information for this report was provided by AP and AFP.