One person is dead after an early morning fire in North Bay.

The blaze broke out at around 3:30 a.m. on Thursday at a six unit rooming house on Algonquin Avenue.

Fire officials said three tenants were rescued by firefighters, but a fourth person discovered on the second floor did not respond to resuscitation efforts.

"Fire crews immediately began resuscitation and patient care was transferred to North Bay EMS upon their arrival, which transported the victim to hospital," reads a media release, issued by North Bay Fire and Emergency Services.

"The building did have working smoke alarms that alerted the tenants to the fire."

The Ontario Fire Marshal’s office is investigating the blaze, with North Bay fire and police officials providing assistance.

“It’s a fatality and the investigation will move at its own pace," said Captain Randy Vezina, Fire Prevention.

"This will be an extended investigation before anything formal will be produced by the province or by North Bay police or ourselves.”