Crowds of festival goers at the Tomorrowland festival in Barcelona were forced to evacuate in the early hours of Saturday morning (local time), after a huge fire engulfed the main stage.
Emergency services said more than 22,000 people were forced to flee the one-day festival, held in the city's Parc de Can Zam de Santa Coloma de Gramanet, after a fire broke out on the left hand side of the main stage.
It occurred just hours before Steve Aoki was set to headline the event, the Standard reports.
Video posted to social media showed thick plumes of smoke billowing into the sky.
One eyewitness posted on social media saying the stage "just exploded".
On Facebook, Tomorrowland organisers said: "Tonight, July 29th 2017, the UNITE Barcelona stage caught fire due to a technical malfunction.
"Thanks to the professional intervention of the authorities all 22.000 visitors were evacuated safely and without reports of injuries.
"Authorities will follow up and continue the investigation with the local Spanish organizer of UNITE."
Newshub.