Factions of the Turkish-backed opposition Syrian National Army are recruiting minors to fight in Libya, according to a report laying out in exhaustive detail Turkey’s use of Syrian rebels to prop up Libya’s Government of National Accord.

The 40-page document, prepared by Syrians for Truth and Justice and shared exclusively with Al-Monitor, cites sources on the ground in Syria and in Libya who say Syrian teenagers have been recruited and are part of their units in the battlefield. The report will be published Monday by the nonpartisan not-for-profit organization, which documents human rights abuses in Syria.

The children are among well over 2,000 Syrian rebels believed to have been deployed over the past year via Turkey in support of the Government of National Accord against the eastern warlord Khalifa Hifter, who is backed by Egypt and the United Arab Emirates.

“Our investigation revealed that children are issued forged identity documents with false information about their date and place of birth, and are accordingly registered in the personal status records of the [Syrian] National Army,” the report says. Some of the children used the names of their older brothers in their fake papers, and the recruitment of child soldiers is ongoing, according to the report.