Video appears to show final moments before helicopter crashed into NYC's East River

A chilling Instagram video taken by one of the victims of the East River helicopter crash captures the final moments before the chopper plunged into the New York City waterway, killing five of the six people aboard.

Fox News has identified the victims as Trevor Cadigan, 26, of Dallas, Carla Vallejos-Blanco, a 29-year old visiting the city from Argentina, Brian McDaniel, a 26-year-old Dallas firefighter, Daniel Thompson, a 34-year-old from New York City, and 29-year-old Tristian Hill.

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A still image from an Instagram video appears to show the final moments before Sunday's helicopter crash in New York City's East River.  (Instagram)

The video was taken by Cadigan, a video journalist, according to his brother-in-law Travis Howard, who spoke to the Washington Post. 

One of the men in the video is seen flashing a thumbs up as the helicopter took off amidst the sunset Sunday.

The video surfaced as investigators were looking into whether one of the passenger’s bags may have accidentally hit the fuel shutoff button of the doomed helicopter. The helicopter was removed from the river on Monday afternoon.

The wreckage of a chartered Liberty Helicopters helicopter that crashed into the East River is hoisted from the water in New York, U.S., March 12, 2018. REUTERS/Shannon Stapleton     TPX IMAGES OF THE DAY - RC1703685560

The wreckage of a chartered Liberty Helicopters helicopter that crashed into the East River is hoisted from the water in New York, U.S., March 12, 2018.  (REUTERS/Shannon Stapleton)

“Mayday, mayday, mayday,” Richard Vance, the 33-year-old Liberty Helicopters pilot, called out over his radio seconds before going down in the crash a day earlier. “East River engine failure!”

The group of five passengers were on the private Eurocopter AS350 for a photo shoot when it crashed.

The cause of the crash is not yet known, but it is reportedly the third in the past 11 years involving Liberty Helicopters, a company based in Kearny, N.J.

"It took a while for the divers to get these people out. They worked very quickly as fast as they could," Fire Commissioner Daniel Nigro said. "It was a great tragedy that we had here."

The passengers were recovered shortly after the helicopter went into the water around 7:06 p.m. Police and fire department divers had to remove them from tight harnesses while they were upside down, Nigro added.

Three of the passengers were listed in critical condition after being rushed to nearby hospitals, where they later died. Two were declared dead at the scene and police said the pilot freed himself and was rescued by a passing tugboat.

Officials said the water Sunday night was frigid, with temperatures around 40 degrees.

Video posted on Twitter of the crash showed a red helicopter land hard in the river and then flip on its side as its rotors beat the water.

Photo of: Copper down at 88th Street and the FDR in Manhattan. Believed to be helicopter crash pilot Richard Vance.

This chopper went down in the East River

Photo credit: G.N.Miller/NYPost (Staff Photographer).

Note: The First Responders removing the first person from the water (possibly) the pilot.

The pilot of the helicopter, Richard Vance, after emerging from the frigid waters of New York City's East River on Sunday night.  (Courtesy New York Post)

Police sources told the New York Post the helicopter was being flown by Vance, a native of Danbury, Conn.

“He’s a very good pilot,” his father, Anthony Vance, told the newspaper, adding Richard has flown “a lot of years” with a commercial pilot’s license.

A LinkedIn page purportedly belonging to Vance said he has been employed by Liberty Helicopters since April 2016.

"We are focused on supporting the families affected by this tragic accident and fully cooperating with the FAA and NTSB investigations," Liberty Helicopters told Fox News in a statement.

The company says on its website it has been in business since 1990 and offers “unparalleled safety records and a commitment to customer service.”

Yellow buoys that a New York police officer said are suspending a helicopter that crashed into the East River float next to a NYPD police boat at a pier in New York on Sunday, March 11, 2018. The helicopter crashed into New York City's East River Sunday night and flipped upside down in the water, killing at least a few people aboard and leaving some others in critical condition, officials said. (AP Photo/Andres Kudacki)

March 11, 2018: Yellow buoys that a New York police officer said are suspending a helicopter that crashed into the East River float next to a NYPD police boat at a pier in New York.  (AP)

But Sunday’s crash is the third one involving Liberty Helicopters in the past 11 years, according to reports.

In 2009, a sightseeing helicopter of the same model and operated by Liberty Helicopters collided with a small, private plane over the Hudson River, killing nine people, including a group of Italian tourists, the Associated Press reported.

Two years earlier, one of the company’s helicopters, carrying eight people, dropped into the Hudson River but everyone was able to escape, according to WABC.

One witness told the New York Post she watched Sunday’s crash unfold from her apartment window and "immediately thought someone was in there and not going to live."

“By the time we got out here, we couldn’t see [the helicopter]," Mary Lee said. "It was under water.”

The skies over New York constantly buzz with helicopters carrying tourists, businesspeople, traffic reporters, medical teams and others. Crashes are not unheard of.

A crash in October 2011 in the East River killed a British woman visiting the city for her 40th birthday. Three other passengers were injured.

In June 2005, two helicopters crashed into the East River in the same week. One incident injured eight people, including some banking executives. The other crash hit the water shortly after takeoff on a sightseeing flight, injuring six tourists and the pilot.

Fox News’ Edmund DeMarche, Nicole Darrah and The Associated Press contributed to this report.