Cleanup crews have been working to cleanup a petroleum spill into the Grand River near Kitchener this weekend.

Ministry of the Environment officials informed Kitchener city officials after they received a tip about the spill from a resident.

Waterloo’s Region Record reported a significant quantity of an unconfirmed contaminant was spilled.

Approximately 250 meters along the Grand River shoreline have been polluted.

City officials have not yet determined the source of the spill.