Firefighters say one person was injured and one of the pets inside the residence was killed when an apartment building in the Denver metro area caught fire Sunday afternoon.

More than 100 firefighters battled a massive five-alarm fire Friday evening in Denver at an apartment building construction site.

After working overnight, crews are expected to continue through the night Saturday as they tackle hot spots in the building, Denver Fire said.

More than 100 firefighters tackled the huge blaze in Denver, Colorado, which started at a three-story apartment complex under construction on Leetsdale Drive

A massive fire broke out in Denver, Colorado, engulfing an entire apartment block. The fire, which started on Friday evening at around 6.45 p.m. local time, injured one firefighter and footage and images of it circulating on social media show a building in flames.

An unknown number of residents are expected to be displaced following a multi-floor fire at an apartment complex in Lakewood on Sunday.

Residents returned home after a massive fire at a Denver construction site, crediting the quick response of firefighters.

Emergency crews rushed to the scene of a massive fire in Denver, Colorado, on Friday 2.The Denver Fire Department was battling the blaze, which was upgraded to a five-alarm fire, at the intersection of Leetsdale Drive and Forest Street on Friday evening.