Winnipeg police are asking once more for help in a child abduction investigation.

Emily Cablek last saw her two children, Dominic and Abby Maryk, on Aug. 16, 2008.

The two children then went on a court-ordered visitation with their father Kevin Maryk. Police said they were then abducted. Investigators believe they remain in Kevin Maryk's custody and may have been taken out of the country.

Dominic will now be 10 years old and Abby will now be nine years old.

Investigators believe that friends, family members or acquaintances may have information on the location of the children.

Some individuals may also be providing shelter or financial support to enable them to stay hidden, said police.

Anyone with information is asked to contact the missing persons unit at 986-6250.

Police believe Kevin Maryk may also be in the company of his nephew Cody McKay, and his associate Robert Groen. Canada-wide warrants remain in effect for all three individuals.

Officials also made available online a re-enactment video of the abduction.