Human rights lawyers allege that the Nigerian president has committed crimes against humanity against pro-Biafran activists.
The government spokesman is accused of involvement in diverting $2 billion meant for fighting Boko Haram.
Members of Jonathan's government have been accused of stealing money earmarked for fighting Boko Haram.
The Somali militants claimed to have killed more than 100 soldiers in the attack on El Adde.
Thousands of Nigerians are demanding independence for a region in southeast Nigeria.
Nigerians have fled Boko Haram while CAR residents have been uprooted due to sectarian violence.
A Nigerian court ordered the arrest of an ex-militant kingpin, prompting a spate of attacks on oil pipelines.
President Buhari has ordered that 20 retired and serving military officials be investigated for corruption.
Information minister Lai Mohamed said ex-ministers and bankers were among those responsible.
The Shiite leader has been detained since December, when soldiers clashed with Shiite sect members.
The attack bears the hallmarks of Boko Haram, which has stepped up attacks in Cameroon.
Mohammed allegedly colluded with Sambo Dasuki to steal arms money earmarked for fighting Boko Haram.
The IMF managing director is visiting Nigeria as the country struggles to deal with a global oil slump.
More than 200 girls remain missing despite Buhari's claim that Boko Haram had been "technically" defeated.
Femi Fani-Kayode said "all hell will break loose" if the high-profile prisoners are harmed.
Buhari was speaking, for the first time since the May elections, at a 'presidential media chat' with journalists
The Nigerian president claims Boko Haram has been "technically" defeated despite an upsurge in attacks.