Updated

Canada's national police force says it is has started an investigation into two cases of babies who were allegedly switched at birth at a northern Manitoba hospital 41 years ago.

The Royal Canadian Mounted Police said Friday that it has an obligation to the families and the public to see if the mix-ups were accidental or criminal.

Two men from Garden Hill First Nation first announced last year that DNA tests had proved they were switched at birth at the Norway House Indian Hospital in 1975.

Two other men from Norway House, born at the same hospital in the same year, came forward with the same story in August. DNA tests confirmed their story last month.