In a statement the Roundhouse reported, "Approximately 30 minutes into the performance, a piece of moving stage equipment on which two artists were performing suffered a technical failure and fell slowly into an area where audience members were standing. The equipment was brought in for the production and was not part of the Roundhouse structure. The show was stopped and the performance space was cleared immediately."
The affected equipment was said to have a mechanical sail that rotates above the audience.
The statement continued, "A handful of injuries were reported, and whilst extremely regrettable, fortunately none of these injuries were serious. Those affected were seen by medics and four people - including one performer - were treated for minor injuries. The Roundhouse is committed to the safety and well-being of its audiences and undertakes rigorous risk assessments for all of the shows that take place here. We are investigating what led to the issues experienced during this performance."
Weekend performances following the incident were canceled. Performances will resume Jan. 21, without the sequence in question.