COLLINGWOOD, Ont. - Provincial police have released the names of a mother and daughter who died in an apparent drowning earlier this week at a resort northwest of Toronto.

Xia Zhen, 34, and Chloe Gong, 5, of Markham, Ont., were on vacation at Mountain Springs Resort just west of Collingwood, Ont., when tragedy struck on Tuesday evening.

Police said the two victims were pronounced dead in hospital. Autopsies were conducted on Wednesday to determine a cause of death but the results have not yet been released.

Yiting Gong said it only took minutes for him to lose his wife and young daughter, telling CTV Toronto on Wednesday that "just 10 minutes and they are gone."

The grieving father is now questioning why the resort does not have anyone supervising the pool.

Jennifer Grant, a staff member at the resort, said there are clear signs indicating that the pool is unsupervised.