A four-month-old baby girl has critical injuries after police say she was “grievously assaulted” during an incident involving a man and a woman at an Etobicoke apartment building this morning.

Toronto police Const. David Hopkinson said they received a call about a stabbing at a building near Sherway Gardens Road and Evans Avenue at around 8:35 a.m.

Police confirmed to CTV News Toronto that the initial call came from inside the lobby of the building, but it was not clear where exactly the incident took place.

When officers arrived, they found the baby unconscious and a man suffering from serious stab wounds, Hopkinson said.

Police initially reported that the baby had been stabbed but later determined that her injuries are “not attributed to stab wounds.”

Hopkinson previously said that the baby appeared to have been “grievously assaulted in some other way” but would not provide any further details.

“What we do know is the injuries that brought her to the hospital in critical (condition) are not related to stab wounds, they are related to that other assault,” Hopinkson said.

The baby girl remains at Sick Kids Hospital in critical condition.

The man who suffered serious injuries in the ordeal was also taken to hospital for treatment and is currently in non-life-threatening condition.

Hopkinson told CP24 that police conducted a “comprehensive search of the area” and located a seriously injured woman who was taken into custody.

“We had to take her to hospital to be treated for those injuries but she remains in custody,” Hopkinson said.

Peel Regional Paramedic Services said the woman was transported to a Mississauga-area hospital with lacerations on her arms.

Police are not commenting on the relationship between the three people involved in the incident.

“Part of the event occurred in the lobby and we’re looking to find out any other locations where something might have happened,” Det. David Knowles told reporters gathered outside the building. “We’re still trying to find out all the specifics.”

Police said they believe they’re dealing with multiple scenes, possibly “two or three” Hospkinson said.

“One being that lobby where the man and the baby were; potentially where the attacked occurred, we’d be dealing with that scene and then I don’t know if the woman was caught in another area and if she was, that scene would have to be forensically identified by officers,” Hopkinson told CP24.

Knowles confirmed that the injured infant is a girl but would not elaborate on the severity of her injuries.

“I don’t have any specifics on the baby’s condition at this point. I can’t even tell you right now what the injuries are,” he said. “We do have a child that was taken to hospital and I’m going to be attending the hospital to follow up on that.”

Hopkinson said this type of a call is the sort that officers dread.

“However you want to look at it, this is an officer’s worst nightmare,” he said.

Police remain on scene to investigate. They will be canvassing the area looking for any information from the public related to the incident.