NEW YORK, March 28 (Xinhua) -- Four more human body parts were found in a building across from the World Trade Center site as construction workers were cleaning toxic waste from the vacant skyscraper, reconstruction workers said Tuesday.

    The finding came after 10 bone fragments on the building's rooftop was reported last fall.

    Medical examiners office will extract DNA from the remains recovered from the former Deutsche Bank building and try to match it against a database of the 2,749 people killed at the trade center on Sept. 11, 2001, said Ellen Borakove, spokeswoman for the city medical examiner's office.

    Some victims' family members said forensic experts should search the 41-story building again to look for the remains of loved ones killed more than four years ago.

    "I'm not trying to malign the construction workers, but this is not what they're trained to do," said Diane Horning, whose son was killed at the trade center and who has filed suit to remove trade center debris from a Staten Island landfill where victims' remains were found.

    More than 40 percent of the victims at the trade center have not been identified. The medical examiner's office is storing more than 9,000 unidentified remains and hopes that more sophisticated DNA technology can allow for identifications in the future.

    Two human remains were found on Jan. 27 on the 38th floor of the Deutsche Bank building, Borakove said, adding that workers again found two bone fragments on the building's rooftop last Friday.

    Last September, construction workers clearing gravel found 10 human bone fragments on the building's roof, she said.

    Officials with the Lower Manhattan Development Corporation, owner of the building, said that instructions had been given to all its workers to follow a protocol and turn over any remains or other sensitive materials, "to make certain that anything found atthe building will be treated with dignity and respect." Enditem