The pilot of a private helicopter, who is presumed dead, took off from the 34th street heliport and crashed into the roof of a Midtown Manhattan skyscraper 11 minutes later, according to NYPD Police Commissioner James O'Neil.
The helicopter came down on the 54-storey AXA Equitable constructing, located at 51st Aspect street and Seventh Avenue, now not removed from Central Park.
According to the Federal Aviation Administration's airmen records, McCormack was issued his commercial pilot license on September 24, 2004, and received his flight instructor certificate for "Rotorcraft-Helicopter" past year on June 28, 2018.
The city fire department said on Twitter that one unidentified person was killed.
"If you're a New Yorker, you have a level of PTSD, right, from 9/11", the governor said.
De Blasio said authorities were seeking to determine whether the pilot made contact with LaGuardia's tower or other air traffic controllers before the crash. The helicopter crashed into a building on 7th Avenue in NY, killing the pilot on the spot.
The city's top police officer said the aircraft's reason for flying in such poor weather would be "part of the investigation".
De Blasio said it was unclear why they pilot - identified as Tim McCormack, 58, of upstate Clinton Corners - would start flying over the city after attempting such a maneuver.
"We are mourning the loss of Tim McCormack, who has flown for us for the past five years", a spokesperson for the company said. "But there's no indication that that is the case", Cuomo said.
"The floor literally moved beneath me", she said.
The pilot is believed to be the sole person aboard the crashed commercial chopper, which took off from a heliport in Manhattan 11 minutes before accident, according to media reports. "It sounded like a small engine plane at first then I just felt the building shake", he said.
The East Clinton Volunteer Fire Department posted on Facebook that McCormack's "technical knowledge and ability to command an emergency were exceptional".
The incident happened at around 2pm local time on a rainy and foggy Monday on Seventh Avenue. No one else was injured in the crash, which officials said appeared to be an accident - not an act of terrorism.
The building at that location was purchased by the California Public Employees' Retirement System for $1.9 billion in January 2016 with partner CommonWealth Partners of Los Angeles. "Our hearts are with his family and friends".
In 2016, bowing to complaints about noise and air pollution, the city reached a deal with Manhattan's helicopter sightseeing tour operators to cut the number of their flights by half.
Five people died when a sightseeing helicopter crashed into the East River past year.