Fire crews were on a roof Tuesday afternoon battling a 2-alarm blaze in Boston's South End.
Fire officials responded around 3:30 p.m. to the fire at 73 Rutland St., a 4-story brownstone building.
Boston Police responded around the same time to aid with crowd control.
The fire extended to two surrounding buildings, and the smoke could be seen across the city.
No one was injured, and it isn't known yet how many people were displaced.
It is unclear how many people were displaced, but the electricity was turned off in all three affected structures.
In total, it is estimated that the fire caused about $500,000 worth of damage.
Boston Fire officials shared photos of blackened propane tanks on the roof of 73 Rutland St. One of the valves had broken off. A plastic skylight was also melted by the intense heat.
The cause remains under investigation.