Wildlife crews continue to search along the North Saskatchewan River for animals affected by last week’s oil spill.

Saskatchewan’s environment ministry said Monday four birds, one fish and one frog have so far died as a result of the Husky pipeline leak, and an official with Living Sky Wildlife Rehabilitation said workers from several different wildlife groups were still searching the area.

Three oil-soaked birds were located days ago by Matrix, a company hired by Husky to look for affected wildlife.

One of the three birds — a sparrow — has since died while the remaining two — a great blue heron and a Canada goose — are still in the care of Living Sky. The wildlife group is using space provided by Lend A Paw Animal Rescue in Maidstone, Sask., to care for the birds.

Between 200,000 and 250,000 litres of crude oil and other material spilled into the North Saskatchewan River from a Husky Energy pipeline near Maidstone on Thursday.

North Battleford shut off its water supply intakes on Friday, while Prince Albert closed its water intake Monday morning.

No new animals have been brought to the Lend A Paw building since the three birds were found days ago.

--- with files from CTV Saskatoon's Emily Pasiuk