The United States on Monday condemned a bomb attack on a packed bus station in Nigeria which killed 71 people, and called for a full investigation.

"We are outraged by this senseless act of violence against innocent civilians," State Department spokeswoman Jen Psaki told reporters, also condemning a series of attacks on three villages in Borno State over the weekend.

A bombing at a bus station packed with morning commuters on the outskirts of Nigeria's capital killed 71 people and wounded 124 on Monday, with the president blaming the attack on Boko Haram Islamists.

The explosion rocked the Nyanya station south of Abuja at 6:45 am (0545 GMT), leaving body parts scattered across the terminal and destroying dozens of vehicles.

Suspected Boko Haram Islamists on Sunday killed at least 60 people in Nigeria's troubled northeastern Borno state close to the border with Cameroon, a local official said.

"The attackers, who are no doubt Boko Haram insurgents, attacked Amchaka and nearby villages this morning, hurling IEDs (improvised explosive devices) into homes and setting them on fire," Baba Shehu Gulumba, Bama local government administrator, told Agence France Presse.

Suspected Boko Haram Islamists have killed 19 people, including six college teachers, in three separate attacks in Nigeria's troubled northeastern Borno state, residents and travelers said Friday.

The killings took place on Thursday and Friday in Dikwa, Kala-Balge towns and near Dalwa village in the state, the bastion of the Islamist sect, they said.

Amnesty International urged the Nigerian security forces Friday to disclose the whereabouts of a man who was arrested after tweeting pictures of an attempted jail break at the headquarters of the intelligence agency.

"Nigerian security forces should immediately disclose the whereabouts and legal status of Yusuf Siyaka Onimisi," said the rights group's Netsanet Belay in a statement.

A Nigerian man who tweeted pictures of an attempted jail break at the country's intelligence agency headquarters has been arrested and held incommunicado for 11 days, his family said Thursday.

The head of the National Human Rights Commission, Chidi Odinkalu, told Agence France Presse that his office was investigating the alleged disappearance of 32-year-old Yusuf Siyaka Onimisi.

Scores of Islamist gunmen attacked a police station, a court and a bank in northern Nigeria on Wednesday, killing seven officers and a civilian, a police chief told Agence France Presse.

The raid in the town of Gwaram in Jigawa state began at 1:00 am (0000 GMT) and sparked an hours-long shootout with the security forces, said Tamari Yabo, the assistant inspector-general of police in charge of the region.

Nigeria's top human rights body on Monday said that eight people shot dead by intelligence agents in Abuja last year were civilians and not Boko Haram militants, as the government claimed.

The Directorate for State Services (DSS) said on September 20 last year that it uncovered an Islamist plot to attack a residential building used by federal lawmakers.

Boko Haram militants attacked a village in restive northern Nigeria, killing 17 people and setting houses and cars alight, the local government said Sunday.

Among the dead were Muslim worshipers shot as they prayed in the village mosque, said Abdullahi Bego, spokesman for the governor of the troubled state of Yobe.

Gunmen believed to be Fulani herdsmen stormed a meeting in northern Nigeria's Zamfara state and killed 30 people, police said Sunday.

"Thirty people were killed and several others injured," Zamfara state police spokesman Lawal Abdullahi told Agence France Presse.