A man was taken to hospital in critical condition after suffering burns to about half of his body during a fire on Gilmour Street on Thursday night, paramedics say.

The fire broke out in a fifth floor unit at 379 Gilmour St., a seven-storey apartment building between Bank and O'Connor streets, at about 10 p.m. Thursday.

When firefighters arrived at the upper-floor unit they found an injured man unconscious near the door and got him out of the apartment. No one else was inside the affected unit.

Crews extinguished the fire, ventilated smoke from the building and assisted residents.

Paramedics took over care of the patient and took him to hospital in critical condition. He was suffering burns to about half of his body, paramedics said on Friday morning.

The cause of the fire has not yet been determined.