Child Youth and Family staff collected the children.
Police did more investigations and arrested the man on a warrant for outstanding unpaid court fines.
A Child Youth and Family spokeswoman later confirmed the children were safe and well in the care of wider family.
The CYF website said when it was not safe for a child or young persons to be cared for at home, other family members or caregivers were found for them to live with.
Many would return home once things were sorted out, while others would stay permanently with their caregivers or extended family.
There were 970 children in out-of-home placements in Northland between 2009 to September last year.