NEW YORK (AP/WCBS 880) — Some relatives of victims who died a decade ago at the World Trade Center are decrying a plan to place more than 9,000 unidentified pieces of human remains at the site of the National September 11 Memorial and Museum.

LISTEN: WCBS 880 spoke with Norman Seigal, an attorney for a group of 9/11 family members

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Family members and supporters gathered Sunday just steps from Ground Zero to lobby city officials to alter plans for the museum near the site.

Sally Regenhard, who lost her firefighter son Christian, says it’s unacceptable to house unclaimed remains below ground at the memorial.

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She and others want a separate facility built at the site, something akin to the Tomb of the Unknowns in Arlington National Cemetery.

Christy Ferer, the mayor’s liaison to the families, said there were numerous consultations with relatives about the placement of the remains. She said the families will have private access to the area to grieve.

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