The Dutch Defence Ministry said it was aware of the casualties from the beginning of air strikes but refused to inform the Netherlands parliament.
The 'defeat' of Daesh will lead to a rebirth of Daesh that could make them more dangerous, and harder to fight.
As a small yet significant presence of Daesh continues to haunt Iraq's Salah al Din province, residents accuse the US of backing the terror group.
Daesh was forced out of Hawija – a district in northern Iraq – by Iraqi forces in October in an offensive that has seen the group lose the vast bulk of territory it seized in 2014.
The town in northern Iraq was one of the group's last enclaves in the country.
The town of Sharqat was the first goal of a major offensive launched a day ago to recapture Daesh-bastion Hawija, still 30km away, and one of just two enclaves Daesh still holds in Iraq.
Hawija, west of the oil city of Kirkuk, is one of two areas of the country still under the control of the militants.
The Peshmerga forces, based in the northern city of Kirkuk, say they have been waiting for the Iraqi army to finish its operations in Mosul first. But critics say the Peshmerga have been delaying their attack for political reasons.
More than 100 Daesh members in the Kirkuk region have been jailed and another 250 are in prison awaiting trial, but sleeper cells still pose a threat with surprise attacks.
The civilian convoy was on its way from the Iraqi town of Hawija, about 120 km (75 miles) south of Daesh's stronghold Mosul.
Subscribe to our Youtube channel for all latest in-depth, on the ground reporting from around the world.
Copyright © 2020 TRT World.