An Amber Alert for five children last seen in a town near St. Catharines has expired, though Niagara Police say the children have not been located and the investigation is ongoing.

Police say the Amber Alert expired due to “technical” reasons, but does not mean that the Alert has been cancelled or that the investigation is resolved.

Police say the children are believed to have been taken from their home in Jordan, Ont. sometime between Sept. 19 and Sept. 25 by their father, Ian MacDermid, 49.

MacDermid is described as a white male, 6’, between 265 and 280 lbs., with blond hair, blue eyes and facial hair. He may be driving a gold or beige pickup truck.

The children are described as:

Evalyn MacDermid, female, age 5, 3’8”, long black hair, medium build, Asian

Mattias MacDermid, male, age 10 years, 4’8”, light brown caramel hair, small/medium build, Asian

Sovereign MacDermid, female, age 11, 5’2”, heavyset, long black hair, Asian

Eska MacDermid, female, age 13, 5’1”, medium build, long brown hair, Asian

Magnus MacDermid, male, age 14, 5’6”, black spiky hair, medium build, glasses, Asian

Police say the children are the subject of a temporary custody order that their father is allegedly contravening.

They are asking anyone with information on the whereabouts of MacDermid or the children to call their local police.