A four-month-old girl is in critical condition after police say she was assaulted during a violent incident in which a man was assaulted and stabbed in west Toronto on Wednesday morning.

Police initially said that officers responding to the call at 8:35 a.m. ET found a man and the infant with stab wounds in the lobby of a residential building near Sherway Gardens Road and Evans Avenue in suburban Etobicoke. However, on Wednesday afternoon, police said it was unclear whether the baby had been stabbed.

"I had reported that the baby was assaulted in another manner," Toronto police Const. David Hopkinson told reporters at headquarters. "It is that assault that finds that baby in such critical condition."

The baby was rushed to a downtown trauma centre for treatment. The man, who had less serious injuries, was also taken to hospital.

A woman initially fled the lobby, but was found by officers a short distance from the scene. Police said earlier that she had suffered very serious injuries and required medical attention. Police later said the woman's injuries, while serious, are non-life-threatening.

3 scenes

The woman is in police custody in hospital, Hopkinson told reporters at headquarters. He would not speak to the nature of the woman's injuries, or where she was located.

"The investigation is ongoing, and we're trying to gather a bigger picture of what took place," Hopkinson said, noting that there were at least three scenes for police to process: the location where the assaults took place, the lobby and the location where the woman was found.

Hopkinson also would not discuss the relationship between the three people, or their connection to the building. He would only say that a 911 call was placed by someone in the lobby.

He said police are not looking for anyone else in connection with the incident.

"When you put on this uniform or that of any other first responders, you are there to help people, particularly those that are most vulnerable," Hopkinson said.

"Four-month-old baby is the worst call you can go to. It will affect those officers now and into the future."