One of the daughters of a woman who drowned in a hotel pool near Kingston, Ont., has died in hospital.

Police say 14-year-old Kinza Kaianad died Monday evening at Kingston General Hospital as a result of injuries she sustained Saturday in a hotel pool in Gananoque, roughly 30 kilometres east of Kingston.

Her mother, 43-year-old Naila Yasmin, died in hospital on Sunday.

Yasmin, Kaianad and another daughter, age 11, were found unconscious in the indoor hotel pool just before 9 a.m. Saturday.

Police say the 11-year-old daughter remains in Kingston General Hospital in serious condition with life-threatening injuries.

None of the three knew how to swim, police said.

Kai Liu, the chief of the Gananoque Police Service, said that a number of people jumped in to help when they realized what had happened.

"The first two officers that arrived on scene [were] assisted by one employee and another tourist who was staying at the hotel," he said.

"[They] were able to pull three unconscious people out of the deep end of the swimming pool and immediately commence with CPR."

Liu said police interviewed guests who were staying at the hotel at the time and that the victim's husband had been somewhere else in the building with the couple's two sons.

The Ontario Provincial Police have been called in to help with the investigation.

With files from The Canadian Press