KADUNA, Nigeria (AP) — Ten generals and five other senior military officers have been found guilty in courts-martial of providing arms and information to Boko Haram extremists, several Nigerian newspapers said Tuesday, though the military insisted there was no truth in the reports.

They follow months of allegations from politicians and soldiers who told The Associated Press that some senior officers were helping the Islamic extremists and that some rank-and-file soldiers even fight alongside the insurgents and then return to army camps. They have said that information provided by army officers has helped insurgents in ambushing military convoys and in attacks on army barracks and outposts in their northeastern stronghold.