Thunder Bay police are investigating a homicide on the city's north side.

Police report a woman was found outside a residence on Lake Street by emergency officials just after 3:30 a.m. Tuesday. The woman, who had serious injuries, was taken to hospital, where she was pronounced dead.

Officers were seen marking evidence in a laneway behind homes on Lake Street.

"Police are going to be scouring the area. Forensics are looking for anything that could be evidentiary, that could connect it" said police spokesperson Chris Adams. "Anything to the incident itself and how it happened."

Identification of the victim is expected to be made after a post-mortem examination.

"I think you have to put things in context"

Adams said although police have no suspect in mind, the public should not be worried.

"Most of the crimes are usually committed by people who are known to each other. We're not sure if that's the case here, but that will be examined," said Adams.

"I think you have to put things in context. This is the second homicide this year."

One woman who has lived in the neighbourhood for 17 years said it keeps getting rougher.

"I'm hearing screaming and fighting and people swearing", said Sandra Byzewski. "I mean, really fighting each other and 'I'm going to kill you,' and all kinds of stuff like that."

Byzewski said she doesn't go out at night anymore, and has had to call police a few times to report violent incidents.