New Delhi, Aug. 19 -- 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 initia...