Security - Nigeria's northern city of Maiduguri was rocked by three bomb explosions Friday morning, as insurgents suspected to be members of the Boko Haram Islamic sect invaded the city, residents said.
The huge explosions were heard all over the city, which is the capital of Borno state - the epi-centre of the insurgency that has wracked the North-east.
The attackers were said to have also laid a siege on the army barracks in the city, exchanging gun shots with soldiers.
Casualty details are yet unknown as the situation has continued to unfold, but residents of the city are said to have been thrown into confusion.
A Nigerian Air Force jet is said to have been dispatched to the city to tackle the insurgents.
The attack came a few days after over 100 people were killed in attacks by suspected cattle rustlers on several villages
in northern Katsina state on Tuesday and Wednesday.
The local Premium Times reported that the attackers, numbering over 100, invaded the villages of Kurar Mota, Marabar Maigora, Sabon Layin Galadima, Unguwar Doka, and Maigora, all in Faskari Local Government Area of the state.
Most of the victims, said to be women and children, were set ablaze in their homes.
Nigeria has been rocked by an Islamists-led insurgency since 2009, claiming thousands of lives.
Though the North-east, which is the worst hit, has been placed under a state of emergency, the insurgency has not abated.