In a statement marking International Day in Support of Victims of Torture, Amnesty said it continued to receive regular reports of torture and other human rights abuses in military and police custody.
Three bombers detonated their explosives outside a hall in Konduga, 38 kilometres from the Borno state capital Maiduguri, where football fans were watching a match on TV.
The assault, which raised questions about government claims to have almost defeated the insurgents, took place in the town of Kareto on Wednesday.
The attacks happened late Monday in six neighbouring villages - Wonaka, Ajja, Mada, Ruwan Baure, Doka, Takoka, and Tudun Maijatau - in the state's Mada area.
More than 200 jihadists were killed in air strikes and a further 87 by ground troops since the offensive began on 28 December, the ministry said in a statement read on state television.
Badeh, 61, died Tuesday "from gunshot wounds sustained when his vehicle was attacked while returning from his farm along Abuja-Keffi road".
At the November meeting in N’Djamena, leaders had focused on overhauling current strategy in their fight against Boko Haram, Buhari said.
Fighters from Islamic State West Africa Province driving in several trucks attacked the base in Cross-Kauwa village and engaged troops in an hours-long gunfight, the sources told AFP late Wednesday.
The Nigerian military broke its silence late Friday evening to confirm that the Metele base had been attacked on 18 November, but did not give a death toll.
In the video, US president Trump warns that soldiers deployed to the Mexican border could shoot Central American migrants who throw stones at them while attempting to cross illegally.
Hundreds of Islamic Movement of Nigeria members took to the streets on Tuesday to demand the government release their leader Ibrahim Zakzaky.
Kaduna state is where Nigeria's predominantly Muslim north meets the predominantly Christian south, and has seen previous bouts of sectarian violence.
Insecurity has become a major electoral problem for President Muhammadu Buhari, who plans to seek re-election in February and who won power on pledges to deliver peace and stability.
The human rights watchdog says the troops sometimes demanded sex in exchange for food at refugee camps.
The attack started at about 6pm local time on Thursday causing panic among residents amidst the sound of intense gunshots.
The kidnapping is one of the largest since the jihadist group Boko Haram abducted more than 270 schoolgirls from the northeastern town of Chibok in 2014.
More than one hundred girls are missing after an attack on a school in northeast Nigeria by suspected Boko Haram insurgents.
The kidnappings were part of a campaign of attacks last year by the jihadist group whose bid to create an Islamic state in the northeast.
