Iraqi officials have begun the excavation of what is believed to be a mass grave left behind by the Islamic State extremist group during its rampage across the country a decade ago. Local authorities are working with the judiciary, forensic investigations, Iraq's Martyrs' Foundation, and the directorate of mass graves to carry out the excavation of the site of a sink hole in al-Khafsa, south of the northern city of Mosul, the state-run Iraqi News Agency reported Sunday.

Ahmad Qusay al-Asady, head of the Martyrs Foundation's mass graves excavation department, told The Associated Press that his team began work at Khasfa on Aug. 9 at the request of Nineveh province's Gov. Abdulqadir al-Dakhil. The operation is initially limited to gathering visible human remains and surface evidence while preparing for a full exhumation that officials say will require international support.

After an initial 15 days of work, the foundation's Mosul teams will build a database and start collecting DNA samples from families of suspected victims. Al-Asady explained that laboratory processing and a DNA database must come first to ensure proper identification. Full exhumations can only proceed once specialized assistance is secured to navigate the site's hazards, including sulfur water and unexploded ordnance.