Shootings have been reported in two clubs in the Mexican resort of Playa del Carmen during the closing night of the BPM electronic music festival, BBC reported.
Attendees at the Blue Parrot Club said they had heard shots; eyewitnesses claim as many as five people could have been killed.
There has been no confirmation as yet.
Another shooting was reported at The Jungle, where another BPM event was underway.
The festival, which is in its 10th year, is popular with foreign tourists, especially from the United States and the United Kingdom.
The BPM festival ran for 10 days and featured more than 375 musicians, DJs and artists.