Residents of areas on the southern and western edges of Iraqi city of Mosul, currently controlled by Daesh, discovered the graves that also included the bodies of children, the witnesses said on Wednesday.
They added that some body parts in the graves are deemed to belong to members of Iraq’s Yazidi Kurds.
Last month, Kurdish Peshmerga forces discovered nine mass graves containing the bodies of Yazidi victims in the northwestern town of Sinjar.
Daesh started its campaign of terror in Iraq in early June 2014. The heavily-armed militants took control of Mosul before sweeping through parts of the country’s Sunni Arab heartland.
Daesh has been carrying out horrific acts of violence, including public decapitations, against all Iraqi communities such as Shias, Sunnis, Kurds, and Christians.