Daniel Park, 32, was found unresponsive at the Metropolitan Detention Center in Los Angeles early Tuesday, the Bureau of Prisons said.
Sources have since told TMZ the Seattle man is believed to have stepped onto a table and then plunged to the ground floor of the facility.
It wasn’t clear how many floors he fell.
Park was rushed to a nearby hospital, where he was later pronounced dead, the bureau said.
The inmate had been facing conspiracy charges for allegedly shipping explosive materials to Guy Edward Bartkus, the bomber who died in the May 17 explosion at the American Reproductive Centers clinic.
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