The crash at the building on Seventh Avenue, a few blocks south of Central Park, occurred around 1:45 p.m.
The pilot was the only person aboard the helicopter at the time of the incident, Federal Aviation Administration spokesperson Kathleen Bergentold CNN.
Cuomo said it's not yet clear what caused the helicopter to crash-land on the building.
Speaking at a news briefing just after the crash, New York Gov. Andrew Cuomo said that there is "no indication" that the incident was intentional.
During a press conference, New York Mayor Bill de Blasio also stressed that it appeared to be an accident.
South Korea agencies can't confirm Kim brother as CIA source
The Trump administration's strategy toward North Korea is increasingly marked by inconsistencies, if not outright contradictions. Former US officials told the newspaper that Kim Jong Un had no known power base in Pyongyang that would have kept him informed.
The pilot who died after his helicopter crashed into a Manhattan building is being remembered by his former fellow volunteer firefighters.
"Fire has been extinguished", the NYPD tweet said, adding that people should avoid the area between West 51st Street and 7th Avenue.
"At the same time as you are a Recent Yorker, you have a stage of PTSD, perfect, from 9/11".
McCormack worked for Daniele Bodini, founder of the real estate firm American Continental Properties Group, Dudley said. "There may have been casualties involved in people in the helicopter", Cuomo, who was at the crash site, said in a statement to reporters. "We don't know what caused the helicopter to land on top of the building but the people in the building itself, nobody has been hurt".
Thousands of workers at the building were immediately evacuated, while fire fighters took the elevator up 54 floors to extinguish the fire.
Gulf of Mexico dead zone bigger than ever
Rabalais and her team will spend 10 days mapping this year's dead zone at the end of July. This map shows how pollution from cities and farms flows down into the Gulf of Mexico.
"The building shook", a man who said he worked on the 38th floor toldCBS New York. "It sounded like a small engine plane at first then I just felt the building shake", he said.
McCormack was formerly a volunteer fire chief for the East Clinton Fire District. "Phenomenal job by our GREAT First Responders who are now on the scene", Trump said on Twitter after being briefed on the crash.
The skyscraper is managed by Los Angeles-based CommonWealth Partners.
"We are pretty shocked we hope everyone is OK and safe", said Ron Magee, 55, a real estate agent on vacation from Las Vegas with his family.
The FDNY confirmed on Twitter that they were operating at the scene in Manhattan following a crash landing.
FAA spokesman Kathleen Bergen declined to say whether the helicopter that crashed was flying below 1,100 and whether it was following the East River corridor, or whether additional restrictions might apply in low visibility, saying those issues remained under investigation.
Trump renews Fed attack over rates
The 0.1 percent increase was the smallest increase since January, MarketWatch reported, matching its analysts' forecast. As he is part of the voting team that sets Fed rates his comments spurred investors and market forces.
Spain come from behind to beat South Africa
Nigerian defender Faith Michael was stretchered off after a collision with team-mate Tochukwu Oluehi. Gwinn's powerful 66th-minute shot from the edge of the penalty area flew into the left corner.
China prepares for 2019 FIFA Women's World Cup opener
At midfield, 24-year-old Lindsey Horan and 23-year-old Rose Lavelle figure to thrive in their first chance on the World Cup stage. However, it is just a fraction of the $400 million in prize money for last year's men's World Cup in Russian Federation .