ISIS militants are carrying out atrocities as they lose control of their territory in northern Iraq
A nine-month-old baby boy was among the victims of the atrocity was which was carried out near the north-westerern Iraqi town of Kirkuk.
It is believed the family was arrested and executed on the spot for trying to leave its so-called caliphate.
Local media reports said ISIS militants arrested the mother, three girls and one boy, on the Himreen Highway in northwest Iraq.
ISIS militants have been targeting Iraqi security service members
They were then burned alive in front of other displaced civilians.
The horrific killings appear to be part of renewed campaign of brutality by ISIS thugs as they begin to lose their grip on vast swathes of their territory.
Kirkuk has been liberated from ISIS, also known as Daesh, but the terror group still holds areas of the surrounding countryside.
Local media said militants had also killed a teenager and a former police officer in the in al-Rashad area 40-miles south of Kirkuk
ISIS has lost control of Kirkuk but still holds areas of countryside outside the town
The violence comes as more ISIS militants flee the town Mosul as Iraqi forces continue to make advances in the town.
Iraqi lieutenant-general Abdul Ghani al-Assadi said most ISIS commanders that stayed in Mosul had been killed in battles with government forces.
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He said the fight to take the western side of Mosul, which remains under the jihadists' control, should not be more difficult than the one on the eastern side which was now mainly under government control.
An ISIS militant leads a prisoner away
The fight against ISIS
Fri, November 18, 2016
The battle against ISIS militants (also abbreviated as Daesh, ISIL, IS and Islamic State) continues in the Middle East.
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Forces battle against ISIS
Iraqi prime minister Hailer al-Badri said ISIS had been severely weakened in the campaign.
If the US-backed campaign is successful it will spell the end of the Iraqi part of the self-styled caliphate declared by the ultra-hardline Islamic State in 2014, which extends well into neighbouring Syria.
Several thousand civilians have been killed or wounded in the Mosul fighting since October.