Firefighters were called to the heart of Sliema on Tuesday afternoon, after a reported blaze in an apartment.
The alarm was raised at around 3.55pm when police were informed of a fire at a residence at Triq Ġuze Howard, corner with Dingli Street.
A witness on site said a man appeared to be stuck on the roof of the apartment where smoke is billowing. Police who were also on site, later confirmed that nobody was injured.
In a Facebook post, the Sliema council said a possible electrical short circuit in a penthouse could have sparked the fire.
Firefighters rushed to the scene.