Harris says a family court hearing on the case is scheduled for Thursday in Hunterdon County.
He said DYFS did not tell police the reason the children were removed. He said the parents were not happy about the decision, but that there was nothing unusual about the procedure.
DYFS spokeswoman Kate Bernyk says the child-welfare agency does not comment on specific cases.
The children and their parents, Heath and Deborah Campbell, received attention last month when a northwestern supermarket bakery refused to put Adolf Hitler Campbell's name on a birthday cake.
The couple could not be reached for comment on Wednesday.
The story was first reported by the Easton-Express Times of Easton, Pa.
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From The Express-Times of Easton, Pa., www.lehighvalleylive.com