The luxury Swiss Alps nightclub where at least 40 people were killed and nearly 120 others were injured in a New Year’s Eve inferno, had previously released a promotional video advertising flaming champagne bottles, which authorities deemed the cause of the tragedy.

Le Constellation, a bar in the resort town of Crans-Montana, Switzerland, posted the video on YouTube showing waitresses in helmets moving through the dark, crowded club carrying bottles topped with sparkling candles.

In the footage, the bottles appear to be held high, at times nearly touching the ceiling.

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The video surfaced following a deadly blaze that tore through the basement nightclub at about 1:30 a.m. Thursday during a New Year’s Eve celebration.

At least 40 people were killed, and 119 others were injured, many seriously, when flames and smoke spread rapidly through the packed venue.

According to two witnesses, a bartender was carrying a female staff member on his shoulders while she held a champagne bottle fitted with a lit sparkler or flare near the wooden ceiling above the bar area.

Moments later, fire erupted overhead.

Emergency crews and medical aircraft are seen at a regional airport in Switzerland as victims of a deadly New Year’s Eve bar fire in the Alpine resort town of Crans-Montana were transported for treatment. (Reuters/Lisa Leutner)

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Valais Attorney General Beatrice Pilloudsaid confirmed on Friday the boozy fireworks were likely the cause, with the flames triggering a violent ignition of combustible gases known as a flashover, causing the flames to spread suddenly.

«The whole ceiling was in flames, and the fire spread really fast. It happened in seconds,» two survivors later told the French broadcaster BFMTV.

Axel Clavier, 16, of Paris, said he felt as though he was suffocating as smoke filled the club.

Clavier told The Associated Press he escaped by using a table to force a plexiglass pane out of its frame amid what he described as «total chaos.» 

He also said he saw waitresses arrive with champagne bottles and sparklers.

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Police officers and first responders stand next to a vehicle on the site of a fire that ripped through the bar Le Constellation in Crans-Montana, Switzerland.  (Maxime Schmid/AFP via Getty Images)

As of Friday afternoon, no arrests have been confirmed.

Pilloud said investigators will work to determine if anyone bears criminal liability for fire by negligence, homicide by negligence, or injuries by negligence.

Since the tragedy, hundreds of people have gathered outside the burned-out venue in Crans-Montana, laying flowers and candles as families waited for news of missing loved ones.

Italian authorities said the death toll could be as high as 47, Reuters reported, citing information provided by Swiss officials, who continue working to identify bodies.

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Swiss President Guy Parmelin described the disaster as «one of the worst tragedies our country has ever known,» noting that many of the victims were young people celebrating the New Year.

While the majority of those hurt were Swiss, four Serbians were injured, along with others from Bosnia, Belgium and Portugal.

Italy and France confirmed some of their nationals remain missing.

Le Constellation did not immediately respond to Fox News Digital’s request for comment.

Fox News Digital’s Michael Dorgan contributed to this report.

Zohran Mamdani, the newly sworn-in mayor of New York City, suggested Friday that the widely adopted definition of antisemitism from the International Holocaust Remembrance Alliance (IHRA) does not actually protect Jewish New Yorkers. The mayor spoke amid backlash over Day 1 executive orders that have angered many Jewish and civil rights groups. 

The self-described democratic socialist also dismissed allegations that the timing of his executive orders, which came just hours after he was sworn in, were illustrative of what critics have argued is his record of hostility toward Israel and the Jewish community. 

The new mayor’s Day 1 directives included rescinding a ban on city agencies from boycotting or divesting from Israel and ending the city’s adoption of the IHRA definition on antisemitism ushered in by the former mayor, Eric Adams.  

«When we speak about the IHRA definition that you asked about, you know, protecting Jewish New Yorkers is going to be a focus of my administration, and I also know that a number, as you said, of leading Jewish organizations, have immense concerns around this definition,» Mamdani said in response to questions about his executive orders Friday afternoon in Brooklyn.

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«What we will do is actually deliver on our commitment to protect Jewish New Yorkers in a manner that is able to actually fulfill that,» he added before moving on to another question. 

When asked about the criticism regarding the speed of the executive orders aimed at rescinding protections against antisemitism in New York City, Mamdani did not directly answer the question.  

«As the new mayor of a city, you have to sign a continuation of all prior executive orders or a revocation or an amendment of all of them. And, so, what we did was sign an executive order that continued every executive order that predated the moment when our former mayor was indicted, a moment when many New Yorkers lost even more faith in New York City politics and the ability of city government to actually prioritize the needs of the public,» Mamdani responded. 

«And what we will now do is showcase that new era to protect each and every New Yorker and to deliver for those same New Yorkers in a manner that they have not seen under prior administrations.»

Newly sworn-in Mayor Zohran Mamdani and former New York City Mayor Eric Adams  (Getty Images; AP Images)

Mamdani’s responses at Grand Army Plaza in Brooklyn came shortly after a slew of civil rights and pro-Jewish organizations doubled down on the criticism over Mamdani’s Day 1 directives affecting the Jewish community. 

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«We are deeply troubled that, on his first day in office, Mayor Mamdani weakened protections to fight antisemitism,» the Anti-Defamation League’s (ADL) New York and New Jersey chapter said Friday. 

The group, alongside a cohort of other New York-area Jewish groups, issued a joint statement against Mamdani’s executive orders. 

«Revoking these executive orders removes key tools for addressing antisemitism, including BDS-driven efforts that seek to demonize, delegitimize and isolate the world’s only Jewish state,» the ADL added.  

Zohran Mamdani has faced backlash from the Jewish community over his Day 1 executive orders affecting Jewish New Yorkers.  (Andres Kudacki/Bastien Ohier/Hans Lucas via Getty Images)

In addition to Mamdani’s executive order rescinding «all executive orders issued on or after September 26, 2024,» which included the measures affecting the Jewish community, the new mayor also unveiled a second executive order on Day 1 establishing five new deputy mayor positions in his administration.

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Also Friday, Mamdani unveiled another new executive order shortly after he was sworn in to establish a new «Office of Mass Engagement,» which aims to prioritize and centralize the city government’s public comment and feedback mechanisms intended to help New Yorkers stay engaged with politics in the Big Apple.

A customer at a McDonald’s in Brazil was seen launching into a flying kick toward an employee during a fight in the fast-food restaurant. 

The incident happened at the chain’s Sao Paulo location during a confrontation between workers and customers, The Sun reported.

A couple was seen arguing with staff members on Dec. 13 when the dispute escalated. 

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As both sides scream at each other, a female customer is seen hurling a fallen burger at one of the employees, the outlet reported. 

In response, an employee throws what appeared to be a burger box at a man in a white T-shirt who appears to be accompanying the woman.

The man leads a small girl away before he launched himself at employees near a counter with a flying kick. An employee then appears to throw a punch, prompting the man to walk away. 

WATCH: FOOD ORDER MIX-UP TRIGGERS BRAWL AT BURGER JOINT, LEADING TO SEVEN ARRESTS

Footage captured an altercation in a McDonald’s in Brazil. (Mike Leidig/newsX)

Other employees attempted to step in as the woman demanded her money back. She is seen picking something up from the counter and throwing it before the footage ends. 

The reason for the dispute was unclear, but local media outlets said it could have stemmed from a food order. 

McDonald’s said it regretted the scenes of violence at its Sao Paulo branch, the Sun report states. 

A McDonald’s employee in Brazil is seen getting ready to throw something toward a customer.  (Mike Leidig/newsX)

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The fast-food giant said it was investigating the incident and taking appropriate measures.