Sixteen residents of a Dorchester home were displaced after a four-alarm fire tore through a triple-decker at 29 Alpha Road Saturday night.

No one was injured, fire officials said. Damage was estimated at $750,000, according to fire department spokesman Steve MacDonald.

The Red Cross was assisting the 10 adults and six children displaced, MacDonald said.

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Investigators do not suspect foul play. The blaze was accidental and began in the first-floor apartment when a candle ignited a puddle of spilled nail polish, according to MacDonald.

A photo, which the department said was captured by a neighbor before first-responders arrived, shows flames roaring on three front-side porches, peeling back the house’s siding and spewing thick black smoke.