This is a developing story. Forensic experts returned to the property Friday morning to confirm and quantify remains. Check back for updates throughout the day.

Law enforcement discovered what sources describe as human remains and documents connected to missing persons during a raid at a home on the 400 block of West Chew Avenue in Philadelphia's Olney neighborhood Thursday afternoon, The Murder Channel has confirmed.

The Drug Enforcement Administration initially responded to the property for an investigation into a person allegedly forging government documents, according to multiple law enforcement sources. But once inside, investigators found records tied to missing persons — and what sources say are signs of foul play inside the home.

One person has been taken into federal custody, sources confirmed. The suspect's identity had not been disclosed as of Thursday night.

Forensic experts returned to the property Friday morning. Authorities have not yet confirmed the number of victims or the identities of those involved.

The U.S. Attorney's Office for the Eastern District of Pennsylvania and the DEA declined comment Thursday night.

What We Know

What We Don't Know

The investigation is in its earliest hours. Authorities have not yet released victim count, identities, or timeline.

We will update this story as official sources confirm information.

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