The Human Rights Watch in its report, had accused the Police, Nigerian Army, vigilante groups and camp leaders of raping young girls and women in various IDPs camps.
Following the report, the I-G set up a special investigation panel to investigate the cases.
Idris made the disclosure at the Inspector-General of Police Conference in Abuja on Tuesday.
He said that the police would liaise with the Army and Air Force to make their men available for a thorough investigation.
Idris said that after the investigation, any suspects found guilty of the offence would be dismissed and taken to court for prosecution.
“We are going to conduct a thorough investigation and if anyone is found guilty we will dismiss him then take him to court,” he said.
He said that the police had put in place some mechanisms, including the deployment of female police officers to IDPs camp to check future occurrences.
President Muhammadu Buhari had ordered the I-G and the affected state governors to investigate the allegation.