The London Fire Department was on scene of an early morning fire around 3 a.m. Saturday at 1864 Dundas Street.
In a post on X, firefighters said there were people inside at the time of the fire. One person was taken to hospital.
Dundas Street was closed in both directions for a period of time, but has since re-opened.
In an update later Saturday morning, the London Fire Department said estimated damage is around $50,000.