The investigation examined allegations of bribery of African officials in connection with a patrol boat contract
No group immediately claimed responsibility for the attack, but Boko Haram and rival Islamic State in West Africa have often carried out attacks in Nigeria's Borno state
One of two boats carrying refugees from Africa reportedly deflates, sinks
The group's leader had not fallen into line with ISIS instructions, including by ignoring calls for Boko Haram to stop using children as suicide bombers.
Big construction company has seen shares plunge due to concerns about debt, stalled projects.
Another 60 people are left wounded after shooting, burning and explosions from three suicide bombers continued for nearly four hours on Saturday.
Islamic militant group Boko Haram may be responsible.
London-based human rights group says Nigerian army responsible for deaths of more than 8,000 people 'murdered, starved, suffocated, tortured to death.'
Millions across Africa's most populous country, however, make it to the ballot box in safety in the most closely contested presidential race in the nation's history.
The pledge of allegiance was attributed to Boko Haram leader Abubakar Shekau.
There were two explosions at two markets and a third blast at a bus station in Maiduguri, witnesses and the local government said.
'Weapons and equipment were also captured and some destroyed,' defense spokesman Major-General Chris Olukolade said in a statement.
In run-up to Nigeria's general elections, scheduled for February 14 and then postponed to March 28 due to security concerns, Boko Haram has stepped up brutal attacks.
Extremists are said to be attacking Maiduguri, the birthplace of the extremist movement, from four fronts and are within 10 miles of the city.
Terrorist group has been increasing its attacks as Nigeria prepares for national elections.
Nigerians wanted to buy retired Cobra attack helicopters last summer to fight Boko Haram.
Nigerian military repels multiple attacks on Borno state capital Maiduguri but Islamist militants capture another Borno town.
Government spokesman says militants released young men, women and children who were kidnapped on January 6.
Amnesty International says as many as 3,700 homes and business were destroyed in the January 3 attack on the town of Baga.
Boko Haram's leaders talk about reviving one of the West African Islamic empires that for centuries prospered, but they demonstrate little evidence of state building.
Nigerian law states that people must vote in their local constituencies to legally cast ballots. But for many, idea of returning home is too harrowing to contemplate.
Scores of militants stormed the remote Malari village in Borno state on New Year's Eve before taking the captives, aged between 10 and 23, into the Sambisa forest.
'If you knew the state your daughters are in today, it might lead some of you ... to die from grief,' Nigerian extremist tells families of more than 200 girls abducted in Nigeria.
Witnesses said the insurgents robbed banks, burned down the main market and sacked the palace, hoisting their black flag over the palace of the traditional ruler.
U.S. unveils coalition to fight Islamic state in cyberspace; Car bombings in Iraq kill at least 34 people; Egypt's birth rate dramatically rises; monitor: Islamic State beheads four tribesmen in eastern Syria.
Wave of violence breaks out after government announces truce with Islamic militants; Boko Haram does not confirm cease-fire.
Nigerian leader making second trip, following 2013 visit; 30,000 Nigerians visited Israel in 2012.
Military and extremists agree to immediate cease-fire in agreement that would bring about release of over 200 abducted schoolgirls.
Boko Haram, which has killed more than 1,500 people in Nigeria this year, is also the group responsible for abducting more than 200 schoolgirls.
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