A 3-alarm fire ripped through three floors of a multi-family home Saturday night in Boston's Dorchester neighborhood.
The fire broke out at a 3-decker at 8 Monticello St. Crews responded around 8 p.m.
The blaze, which was on the porches on the rear side of the building, damaged the building badly.
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Boston Police Officer Luis Lopez was the first on the scene and started kicking open doors to rescue people sleeping inside.
One firefighter was transported with a back injury, but no one else was hurt.
Officials estimate that the fire caused about $500,000 in damage.
In all, 18 people, including four children, were displaced.
In neighboring Roxbury Saturday, a fire is believed to have displaced 22 people.