From CNN's Kevin Liptak
President Trump has been briefed on the helicopter incident in New York, the White House said.
"The President has been briefed on the helicopter crash in Manhattan and continues to monitor the situation," spokesperson Hogan Gidley said.
Kathleen Bergen, spokesperson for the Federal Aviation Administration, said they are gathering information on today's crash landing in Manhattan.
According to FDNY, 100 fire and EMS units have responded to the crash. There are 25 fire department units on scene.
New York Gov. Andrew Cuomo said the helicopter made a "forced landing, emergency landing or landed on the roof."
He added that the information is "very preliminary."
"Preliminary information is that there was a helicopter that made a forced landing, emergency landing, or landed on the roof of the building for one reason or another," he said.
“People who were in the building said they felt the building shake," he added.
A fire broke out when the helicopter hit the roof, but the fire department has it under control, he said.
The New York Fire Department and New York Police Department said a helicopter crashed on the roof of 787 7th Ave., a building in midtown Manhattan.
The address is just north of Times Square and just south of Central Park.
Here's a look at the site on a map:
From CNN’s Mark Morales and Brynn Gingras and Shimon Prokupecz
At least one person has been killed in a helicopter accident in midtown Manhattan, according to law enforcement officials.
The NYPD tweeted that the helicopter made a "hard landing" on the roof of 787 7th Ave.
From CNN’s Mark Morales
The helicopter appeared to make a crash landing on the roof on 787 7th Ave., according to FDNY spokesperson Jim Long.
FDNY is making its way to the top of the building. The building is being evacuated.
An earlier FDNY tweet indicated the helicopter crashed into the building.
The NYPD confirmed the helicopter made a "hard landing."
New York City buildings are evacuating following the helicopter crash.
"Scene at 52nd between 6th and 7th after plane/helicopter crash in NYC. Building was evacuated," Twitter user @SirVontezII wrote.
Here's what the evacuation looks like:
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