The release mentioned that RCMP received a call at approximately 3:45 p.m. from a trapper, identified as Gjermund Roesholt.
He shot and killed the bear, but when he reached the cabin, he found that it had already killed his partner and their daughter.
Roesholt had gone out to check the couple's traps on Monday afternoon, but on his way back, he was charged by the bear, 100 metres from the couple's cabin.
The family had been in the area for the last three months, trapping around Einarson Lake, the coroner says.
"Upon returning to the cabin, he found the bodies of his wife and child just outside the cabin", the coroner's report said.
Coroner Heather Jones said the woman appeared to have gone for a walk with her baby daughter at some point between 10am and 3pm when they were attacked by the animal.
CBC News reported that Theoret was on maternity leave from Whitehorse Elementary School. "Everybody is totally devastated right now", Mr Beaupré said.
A mother and her baby daughter were mauled to death by a grizzly bear while spending maternity leave at a remote Canadian cabin.
Chris Servheen, who was the grizzly bear recovery co-ordinator for the U.S. Fish and Wildlife Service for 35 years, says it is sad to see the death of a woman and her child.
He was forced to shoot the bear dead, he told the Mayo RCMP.