Footage online shows the giant screen falling onto the stage at a Mirror concert in Hong Kong.
Graphic footage circulating online shows the screen falling from high above the stage, hitting the dancer close to his neck, before falling on a second dancer, to loud screams from the audience, the BBC reported.
Hong Kong police confirmed two male dancers, whose names have not been released, were injured. Concert-goers were also treated for shock.
One dancer is reportedly in intensive care in a critical condition after suffering neck injuries, the local hospital said. The other was in a stable condition.
The band’s remaining tour dates have been put on hold while safety checks are completed at upcoming venues and city agencies have been ordered to “comprehensively investigate the incident”.
John Lee, the city’s leader said he was shocked by the incident.
“I express sympathy to those who were injured and hope that they would recover soon.”
Mirror were playing at the Coliseum as part of their current tour. They are one of the most popular boy bands in Hong Kong.