Partygoer, 21, in a coma after swimming pool was filled with LIQUID NITROGEN

A 21-year-old man was left in a coma and eight others were hospitalized after attending a weekend pool party in the Mexican city of Leon where organizers of the event poured liquid nitrogen into the water.

According to authorities of the Health Department of Leon in the state of Guanajuato, the party that took place Saturday was organized by Jagermeister, the alcoholic beverage maker based out of Germany.

According to witness accounts and videos recorded at the event, organizers of the soiree hosted in La Colonia Granjas El Palote attempted to create a smoke effect by pouring four buckets of liquid nitrogen into the pool.

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Officials say that when the liquid nitrogen came in contact with the water, the chemical substance reacted with the chlorine and formed a toxic cloud that left the young party goers gasping for breath, Excelsior.com reported. 

Guests who were milling about around the pool quickly realized that those inside the water began passing out and quickly called for help.

The victims were pulled to safety by paramedics and rushed to the regional hospital where many had been diagnosed with cardiovascular problems.

One of the victims, identified by Univision Noticias as 21-year-old Jose Ignacio Lopez del Toro, remains in intensive care in a comatose state. 

The other eight people received medical attention in the Campestre Medical Hospital and have since been released.

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

The Saturday pool party organized by Jagermeister brought together about 200 young people, among them several hostesses hired to promote the company's alcoholic products.

At some point during the party, employees dressed in orange uniforms could be seen pouring liquid nitrogen into the pool, which quickly filled with thick white smoke.

A short time later, people standing on the pool deck raised the alarm after noticing that some of the revelers cavorting in the pool appeared unconscious. Among the victims was hostess Jael Jimenez.

Aftermath: Liquid nitrogen reacting with chlorine in the water formed a toxic cloud that left the young party goers gasping for breath

Injured: Nine people were taken to area hospitals for treatment, including a 21-year-old man who suffered from cardiovascular complications that landed him in a coma

‘They realized that I had fainted because they saw the tray floating alone in the pool, otherwise I might have drowned," Jimenez told Milenio.com.