NEW YORK — It may take weeks to determine why a huge construction crane that was being lowered during strong winds came crashing down onto a street, killing a pedestrian and crushing a row of parked cars, city officials said Saturday.

Investigators are reviewing surveillance footage from nearby buildings and poring over the twisted, crumpled steel of the 565-foot-long crane, which came thundering down onto a historic Manhattan street 10 blocks north of the World Trade Center during Friday morning’s commute.

Officials said they recovered the mobile crane’s movement recording computer, which could provide clues as to why the crane fell. But they cautioned its data was just one piece of the puzzle.

Work crews crawling over the sprawling accident site began to slice up the downed crane into as many as 35 pieces.


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