It's believed the manhole cover on the city's Fifth Avenue was dislodged by a truck minutes before incident.
Related stories
Was Hitler behind niece's death? Documents raise questions about alibi
Israel's Netanyahu set to hit back at widespread criticism in U.N. address
United States: Trump's unconventional welcome for Xi's state visit
The eyes have it: Rory Stewart’s ‘magnificently strange’ Newsnight moment goes viral
105-year-old investigated for crimes at Nazi PoW camp in Germany
White House still turning away some media outlets despite order