Updated

Ten generals and five other senior military officers were found guilty in courts-martial of providing arms and information to Boko Haram extremists, a leading Nigerian newspaper reported Tuesday.

The news follows months of allegations from politicians and soldiers who have 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.

Leadership newspaper quoted one officer saying that four other officers, in addition to the 15, were found guilty of "being disloyal and for working for the members of the sect."

Defense Ministry spokesman Maj. Gen. Chris Olukolade did not immediately respond to requests for comment on Tuesday. Last week, he denied that senior military officers were being investigated for helping Boko Haram and sabotaging a year-old offensive to curb the 5-year-old uprising that has killed thousands.

Boko Haram has attracted international condemnation and U.N. sanctions since its April 15 abduction of more than 300 schoolgirls, of whom 272 remain captive.

Nigerian activists pressing the government to rescue the schoolgirls filed a complaint Tuesday against a police ban on protests.

"We filed a complaint that the police don't have any right to stop people from expressing themselves," said community leader Pogu Bitrus of Chibok, the town from which the girls were abducted.

The protests have "degenerated" and are "now posing a serious security threat," Abuja police commissioner Joseph Mbu said in yesterday's statement banning all protests related to the topic.

The kidnapping crisis has highlighted Nigeria's failure to curb Boko Haram's uprising.

Leadership newspaper on Tuesday quoted military officers saying the 15 found guilty of providing arms to Boko Haram are among many more being tried at divisional level. The verdicts are being referred to defense headquarters in Abuja, the capital, where the fate of the officers will be decided, the newspaper said. The officers it quoted spoke on condition of anonymity because they are not allowed to give information to reporters.

President Goodluck Jonathan said last year that he believed that some members of the military and even of his own government, including some Cabinet ministers, sympathized with Boko Haram or belonged to the group. The military campaign is backed by a state of emergency in the northeast but it has failed to curb attacks, which actually have increased this year. Jonathan in January fired his entire military command and weeks later replaced the defense minister.

His government and military have been harshly criticized for lack of action that has led to the schoolgirls' prolonged captivity. Defense chief Air Marshal Alex Badeh said last week the military knows where they are being held but fears to use force as it could get the girls killed. Jonathan is under increasing pressure to make a deal with the insurgents, who are demanding he free detained fighters in return for the girls.