WINNIPEG - There are no howls after a pack of wolves managed to get into a polar bear enclosure at a Winnipeg zoo.

The Assiniboine Park Zoo says it has made some changes after the wolves dug a tunnel from their enclosure to visit the bears.

Media reports say five wolves walked around without disturbing two female polar bears that were asleep at the time.

The tunnel forced the zoo to remove the wolves and the two bears and close part of the new Journey to Churchill exhibit until repairs could be made.

The critters are now back in their respective enclosures and the exhibit has reopened.

A zoo spokesman says such adjustments are absolutely normal with the opening of any new exhibit.