Nigerian officers face court martial over Boko Haram
The charges were not specified.
Some officers have long been suspected of colluding with Boko Haram, with President Goodluck Jonathan saying in May that the Sunni jihadist group had "infiltrated ... the armed forces and police".
This is the first time senior army officers have been put on trial for offences relating to the fight against Boko Haram.
The militant group killed an estimated 10,000 people last year in its battle to revive a medieval caliphate in Nigeria, Africa's most populous country and its biggest energy producer.
(Reporting By Felix Onuah, Writing by Julia Payne; Editing by Crispian Balmer)