PHILADELPHIA (CBS) — Four people were hospitalized after an overnight fire in Philadelphia’s Olney neighborhood.

Flames broke out around 2 a.m. Sunday at a home near 7th Street and West Nedro Avenue.

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The one-alarm blaze was placed under control in about a half-an-hour. Authorities say four people were taken to Albert Einstein Medical Center, but their condition was not immediately known.

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Investigators are looking into the cause of the fire.

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