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A pool party in Mexico went horrifically wrong when organisers poured LIQUID NITROGEN into the water, leaving one partygoer in a coma and eight others in hospital.

According to reports and videos filmed at the party, hosted by drinks company Jägermeister on Saturday, staff tried to create a smoke effect by pouring four buckets of the substance into the pool.

The liquid nitrogen reacted dangerously with the chlorine in the water, creating a poisonous cloud which left partygoers fighting to breathe, health officials in Leon, Guanajuato state, said.

Some young people at the party, in La Colonia Granjas El Palote, fell unconscious and slipped under the water while those outside the pool called for help.

(Image: liveleak.com)

(Image: liveleak.com)

Nine victims were pulled from the pool by paramedics and rushed to the nearby Campestre Medical Hospital in Leon, where many were diagnosed with cardiovascular problems.

One victim, identified by Univision Noticias as 21-year-old Jose Ignacio Lopez del Toro, remains in a coma in intensive care.

Footage recorded at the party shows enjoyment turn to panic as guests realised revellers in the water had passed out.

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Jael Jimenez, a hostess at the Jägermeister promotional party, was among the other victims.

She told Milenio.com: “They realized that I had fainted because they saw the tray floating alone in the pool, otherwise I might have drowned.”

Assistant Attorney General Manuel Angel Hernandez has launched a preliminary investigation to determine if charges would be filed in connection to the incident.

A spokesperson for Jägermeister said: “We are aware of this incident in Leon, Mexico, which is currently being investigated by our headquarters in Germany. Fortunately, all of those who required medical attention are out of danger and recovering.

“We are liaising with our responsible distributor in Mexico who is working with the event organisers and the investigating authorities to understand the full circumstances surrounding the events last Saturday night.

"We fully support responsible drinking and adhere to the guidelines within each market in which we operate.”