Nigerian police have freed 27 hostages kidnapped in recent weeks, police officials said Thursday, including five Chinese citizens.

Two Shell oil workers kidnapped in Nigeria's restive oil-rich south have been freed, six days after they were seized by gunmen who killed their guard and driver, police said Wednesday.

His Highness the Amir Sheikh Tamim bin Hamad al-Thani and Nigerian President Muhammadu Buhari held official talks at the Aso Rock Presidential Villa in Abuja on Tuesday.

His Highness the Amir Sheikh Tamim bin Hamad Al-Thani left Kigali city on Tuesday morning, after a state visit to the Republic of Rwanda, heading to the Federal Republic of Nigeria.

His Highness the Amir Sheikh Tamim bin Hamad al-Thani on Sunday embarks on state visits to Rwanda and Nigeria.

Three people died and more than 30 injured in a twin suicide blast in the northeastern Nigerian city of Maiduguri, militia sources and residents told AFP Sunday.

Nineteen people were killed when a truck veered off of the road in northern Nigeria's Katsina state, a road safety official said on Saturday.

A fire killed at least eight people and left 15,000 others without shelter after raging through a northeast Nigerian camp for people displaced by a war against Boko Haram insurgents, aid group Norwegian Refugee Council said on Saturday.

Families kept a vigil at a hospital on Thursday for children pulled from the wreckage of a collapsed school building in the Nigerian city of Lagos, as rescue operations came to an end.

Many people including children were feared trapped on Wednesday after a building containing a school collapsed in Nigeria's commercial capital Lagos, an emergency agency spokesman said, as rescue efforts began.

At least 30 people have been killed by armed bandits who raided a village in northwest Nigeria, police and residents said Tuesday.

A major Nigerian oil pipeline has exploded, local police said Sunday, forcing nearby residents to flee and raising suspicions of possible sabotage.