Thousands of people have been fleeing IS rule in Hawijah, which lies about 220 kilometres (140 miles) north of Baghdad, in recent weeks.
"Six civilians were killed and five wounded by an IED (improvised explosive device)," a colonel in the Kurdish peshmerga forces told AFP.
"It happened during an attempt by families to flee areas southeast of Kirkuk and reach peshmerga positions," he said, speaking on condition of anonymity.
"Among them were women and children," he added.
Other local officials confirmed the information.
Much of the area is littered by bombs and booby traps rigged by IS to prevent movements by Iraqi security forces .
The militants have repeatedly tried to prevent an exodus of the population before a government military operation to retake their areas.
In June this year, IS fighters opened fire on families trying to slip out of the city of Fallujah as Iraqi security forces prepared to move in.
A provincial official in charge of displaced people, Ammar Sabah, said 650 people who had successfully escaped IS areas were taken to camps east of Kirkuk on Sunday.