UPDATE: 7:07 a.m. EST — A hospital worker at CostaMed hospital in Playa del Carmen, Mexico, told NBC News on Monday at least two people were admitted with bullet wounds after a shooting incident at BPM Festival late Sunday night. The man was in "grave" condition, while the woman was stable, according to the hospital worker.

BPM festival’s official Twitter account, which said the shootings were being investigated, later deleted the tweet.

Authorities are yet to confirm the death toll from the incident, which many believe was triggered due to gang violence.

UPDATE: 5:55 a.m. EST — Videos shared on social media show people running through the streets of Playa Del Carmen following the shooting at Blue Parrot club that reportedly left at least five dead. However, there is still no official confirmation of the death toll.

Festival-goer Steven Rosado, a 26-year-old from White Plains, New York, told New York Daily News he heard “at least five to six gunshots,” adding: “I saw everyone that was in line to go into the Blue Parrot running away.”

UPDATE: 4:42 a.m. EST — According to some reports, security footage showed six people were shot during the shooting incident at Blue Parrot club in Playa del Carmen, Mexico, late Sunday night. Police are reportedly investigating the incident, which many believe could be gang-related.

Meanwhile, a Toronto-based DJ who was at the club at the time of shooting said he was back stage when the shooting incident began.

UPDATE: 3:58 a.m. EST — The BPM Festival organizers wrote on their Twitter account that all parties have been shut down following the alleged shooting incident.

UPDATE: 3:48 a.m. EST — Soon after unconfirmed reports surfaced late Sunday night of a shooting at Blue Parrot club in Playa del Carmen, Mexico, in which four people have allegedly died, social media users said shots were fired at another club in the area.

Some users on Twitter also claimed the incident may be a gang-related shooting.

Original story:

Shots were fired at Blue Parrot club in Playa del Carmen, Mexico, late Sunday night during the closing party of the BPM Festival. While there is no official confirmation yet of the incident or the number of casualties, some local media reported at least four people were dead, including a security guard.

Some people attending the festival took to their Twitter accounts to warn about the shooting, saying there were gunmen inside the club.

This is a developing story.