Baby's father was executed by ISIS weeks ago because they claimed he killed one of their friends.
ISIS forces have descended into sickening acts against other humans, slaughtering Christians and Shia Muslims by the thousands in Iraq and Syria.
ISIS has inspired fear and horror with its rule over territory in Syria and Iraq, where mass killings and brutal executions have become its hallmarks. The group controls about 50 per cent of Syria's territory and perhaps a third of Iraq.
ISIS militants have beheaded two Syrian women last month for the first since establishment of its caliphate in Syria.
The report comes as ISIS released another sickening execution video showing the massacre of soldiers as they cowered in a shallow grave.