A New York City sightseeing helicopter broke apart in midair Thursday and crashed upside-down into the Hudson River, killing six people, including a family of Spanish tourists, in the latest aviation disaster in the U.S., officials said.

Mayor Eric Adams said the flight began at a downtown heliport around 3 p.m. and the dead -- including three children -- had been recovered and removed from the water. The flight north along the Manhattan skyline and then back south toward the Statue of Liberty lasted less than 18 minutes.

Dani Horbiak was at her Jersey City home when she heard what sounded like “several gunshots in a row, almost, in the air.” She looked out her window and saw the chopper “splash in several pieces into the river.”

The helicopter was spinning uncontrollably with “a bunch of smoke coming out” before it slammed into the water, said Lesly Camacho, a hostess at a restaurant along the river in Hoboken, New Jersey.

Rescue boats circled the submerged aircraft within minutes of impact near the end of a long maintenance pier for a ventilation tower serving the Holland Tunnel. Recovery crews hoisted the mangled helicopter out of the water just after 8 p.m. using a floating crane.

The flight was operated by New York Helicopters, officials said. No one answered the phones at the company’s offices in New York and New Jersey.

A person who answered the phone at the home of the company’s owner, Michael Roth, declined to comment. Roth told the New York Post he was devastated and had “no clue” why the crash happened.

“The only thing I know by watching a video of the helicopter falling down, that the main rotor blades weren’t on the helicopter,” the Post quoted him as saying. He added that he had not seen such a thing happen during his 30 years in the helicopter business, but noted: “These are machines, and they break.”

Emails seeking comment were sent to attorneys who have represented Roth in the past.

The Federal Aviation Administration identified the helicopter as a Bell 206, a model widely used in commercial and government aviation, including by sightseeing companies, TV news stations and police departments. It was initially developed for the U.S. Army before being adapted for other uses. Thousands have been manufactured over the years.

The National Transportation Safety Board said it would investigate.

Video of the crash suggested that a “catastrophic mechanical failure” left the pilot with no chance to save the helicopter, said Justin Green, an aviation lawyer who was a helicopter pilot in the Marine Corps.

It’s possible the helicopter’s main rotors struck the tail boom, breaking it apart and causing the cabin to free fall, Green said.

“They were dead as soon as whatever happened happened,” Green said. “There’s no indication they had any control over the craft. No pilot could have prevented that accident once they lost the lifts. It’s like a rock falling to the ground. It’s heartbreaking.”

The skies over Manhattan are routinely filled with planes and helicopters, both private recreational aircraft and commercial and tourist flights. Manhattan has several helipads from which business executives and others are whisked to destinations throughout the metropolitan area.

At least 38 people have died in helicopter accidents in New York City since 1977. A collision between a plane and a tourist helicopter over the Hudson in 2009 killed nine people, and five died in 2018 when a charter helicopter offering “open door” flights went down into the East River.

New York Helicopters also owned a Bell 206 that lost power and made an emergency landing on the Hudson during a sightseeing tour in June 2013. The pilot managed to land safely, and he and the passengers -- a family of four Swedes -- were uninjured. The National Transportation Safety Board found that a maintenance flub and an engine lubrication anomaly led to the power cutoff.

Thursday’s crash was the first for a helicopter in the city since one hit the roof of a skyscraper in 2019, killing the pilot.

The accidents -- and the noise caused by helicopters -- have repeatedly led some community activists and officials to propose banning or restricting traffic at Manhattan heliports.

Other recent crashes and close calls have already left some people worried about the safety of flying in the U.S.

Seven people were killed when a medical transport plane plummeted into a Philadelphia neighbourhood in January. That happened two days after an American Airlines jet and an Army helicopter collided in midair in Washington in the deadliest U.S. air disaster in a generation.