(CNN) — Nigerian government officials and the International Committee of the Red Cross have had talks with Boko Haram about swapping prisoners of the Islamist terror group for the more than 200 Chibok school girls kidnapped in April, a source involved in the negotiations told CNN.
The officials met four times in mid August with two senior members of Boko Haram in Nigeria’s capital Abuja.
The swap would involve the released of 30 Boko Haram commanders in the custody of the Nigerian government, according to the source, who asked not to be named due to the sensitivity of the issue.
Boko Haram submitted a list with the names of 30 members who were either convicted or awaiting trial on terror offenses.
“The two Boko Haram negotiators assured the ICRC and government negotiators that the girls were never raped, were never used as sex slaves and were never sexually assaulted,” said the source, who attended the discussions.
The terror group abducted an estimated 276 girls in April from a boarding school in Chibok in northeastern Nigeria. Dozens escaped, but more than 200 are still missing.