SEA ISLE CITY — Authorities searched Thursday for a woman missing after a large fire reduced a half-million-dollar home to a smoldering pile of debris, injuring two people.

The Cape May County Prosecutor’s Office described the unaccounted-for person as an elderly woman. Two residents were taken to area hospitals. Authorities did not provide identities for the injured or the missing woman.

As of Thursday night, officials had not identified the cause of the fire.

About 11:30 a.m., authorities received multiple 911 calls reporting flames and heavy smoke from a house on 54th Street between Landis and Pleasure avenues, police Chief Thomas McQuillen said.

Three side-by-side duplexes with a total of six units were damaged by the fire and smoke. Fire crews worked quickly to protect neighboring homes on the block.