11/12/2014 10:24 EST | Updated 01/12/2015 05:59 EST

Tenants flee into cold when thick smoke fills Calgary apartment block

CALGARY - Police are questioning a man and a woman about a two-alarm fire that forced residents of a Calgary apartment block into the cold night air.

Emergency officials say transit buses were called in to keep tenants warm when the overnight blaze broke out in a second-storey suite of the southwest-area building.

A large volume of flame sparked the second alarm, but the fire in the four-storey block was quickly brought under control.

The building filled with smoke and some occupants had to get safety using firefighters' ladders.

Some media reports say at least one person jumped from a balcony.

There is no word of injuries, but officials say one person was taken to hospital as a precaution. (The Canadian Press, CHQR)