Police are still trying to piece together a triple stabbing at the Delta Chelsea Hotel in downtown Toronto early Monday morning, but have not ruled out the possibility that it was a murder-suicide.

Police were called to the scene at 4:30 a.m. when hotel security discovered a man suffering from stab wounds in the 19th-floor hallway. He was later pronounced dead at hospital.

Two men and a woman were found stabbed to death on one of the upper floors of Toronto's Delta Chelsea Hotel in the early morning hours of Monday morning.
(Dwight Friesen/CBC)

A man and woman stabbed to death were also found inside a room on the same floor of the Gerrard Street hotel.

Police are considering whether the act was a murder-suicide, but say it might have involved a fourth person.

Guest heard commotion

Many of the guests milling about the hotel later Monday morning were unaware of the stabbing but some had heard sounds in the night.

David Richardson, a guest on the 19th floor, said he was having a restless sleep when he heard a commotion in the hallway around 2:30 a.m.

"We heard, 'Help, I'm hurt' or 'my heart.' The next minute we were woken up by a loud bang. What that was, I don't know," he said.

Toronto police said all three victims were white and appeared to be in their mid-30s. No names have been released.

Homicide detectives recovered one knife from the room and were interviewing several people.

Connection between victims uncertain

Few other details have been released by police.

"It's really early in the investigation, obviously. We're working through it, starting at the beginning and … hopefully, at the end of it all, finding the person responsible," said Toronto police Supt. Hugh Ferguson of 52 Division.

Authorities have sealed off the floor and moved guests on the 19th floor to other floors, but the hotel remains open for business.

It's the second prominent Toronto hotel to be hit by violence this summer.

In early July, a man was found shot three times in an elevator at the upscale waterfront Westin Harbour Castle Hotel.

Police later said it appeared to be a drug deal gone bad. The man recovered from his gunshot wounds.