An incident at a stage being set up for a weekend music festival injured at least two people in Miami on Thursday night.

A Miami fire department official said the stage partially collapsed, injuring four people, one of them critically.

But a spokeswoman for the music festival where the stage was being installed said that fewer were injured and that the stage did not collapse.

Workers were making preparations for a concert event when part of an LED screen fell and injured two, said Ultra Music Festival spokeswoman Alexandra Greenberg.