Chris Martell says he has many questions about what happened before his son died. (CBC)

The father of a two-year-old boy who died while in foster care says he was told that the child drowned in a bathtub.

Chris Martell wants to know more about what happened at the farm property near Aberdeen, Sask., but said he isn't getting much information from the RCMP or the Social Services Ministry.

Police said the boy was in a home with five other children and two adults when he suffered an injury.

On Tuesday afternoon, an ambulance was called and the boy was taken to hospital, where he was pronounced dead.

Martell said he hasn't slept since then.

He was trying to have his son placed in a home with the boy's aunt and visited his son just a few days before he died, he said.

"The last thing he said to me was 'Bye-bye, Dad.' I was hoping to see him Friday."

Instead, Martell said, he's planning a wake for that day.

The funeral will be held at Sturgeon Lake First Nation on Saturday.

Aberdeen is about 40 kilometres northeast of Saskatoon.