A crowd of 22,000 pop fans have been evacuated from the Tomorrowland Unite Spain festival after the stage was engulfed in flames.

Fire erupted at one of the world's most popular music festivals which was being held in Barcelona.

Fans fled in terror as the inferno took hold, sending smoke billowing into the sky as the massive speaker system caught fire.

Emergency services rushed to the scene. Everybody was evacuated safely, although some spectators were treated for anxiety attacks.