Gatineau police say a woman in her 50's has died, her husband is in critical condition in hospital and they have no idea at this point what happened to the couple. The two were found by paramedics yesterday evening inside their home on Notre Dame street, near Campeau and Doré.

A few theories are circulating about what happened to this couple including possibly food poisoning.

But at this point, police really don't know and hope an autopsy will shed some light.

Gatineau police set up a command post in front of the house at 841 Notre Dame, snapping photos and bagging evidence of things on the ground, inside the house and on the couple's boat.  Trying to figure out what happened.

“At this point we don't believe it's criminal but we never know,” Pierre Lanthier with Gatineau Police Service says, “we are looking at everything.  Is it something about the food, something else?”

Police were called to the scene just before 9 p.m., after paramedics found two people lying on the floor inside the home.  The 55-year-old woman was pronounced dead in hospital; her husband is in critical condition.

David Normandin rents an apartment at the house and says the couple just came back Tuesday with their boat from Florida after a couple of months away.  He worked overnight and came home to find police everywhere.

“They’re always nice, always happy,” he says of the couple, “I don't know exactly what happened.”

A thought echoed down this quiet, well-kept street.

“I have absolutely no idea what happened,” another woman says in French.

Neighbors tell CTV that the couple lived there with their adult son and his daughter and that they had lived in the home for years though neighbors didn’t know them well.

“Things happen anywhere,” says Johanne Patry, who lives a few houses down the road, “It doesn't worry me. Yes, it’s a quiet area but you never know who your neighbor is.”

Gatineau Police are hoping an autopsy will help answer the many questions they and family members have. In the meantime, they're knocking on doors, trying to piece together this very strange puzzle.

“I don’t know, I don’t know,” says a man sitting on his stoop, “It’s a mystery.”

Police say there don't appear to be any injuries on the couple at this point in time but they aren't ruling anything out. 

Right now, the focus is on the husband who is in critical condition and the hope that he'll pull through.