Three audience members and a performer were injured when a piece of machinery collapsed into the crowd at Friday night's performance of the popular circus show Fuerzabruta.

The immersive circus show, which is currently playing its third stint at the Roundhouse in London, was halted after about half an hour, when a piece of moving stage equipment – a mechanical sail that rotates above the audience – suffered a malfunction. Paramedics attended the scene, treating four people for minor injuries, none of which were serious.

Unlike the ceiling collapse at the Apollo theatre in December, the incident did not affect the permanent infrastructure of the venue itself. A spokesperson for the Roundhouse confirmed that the mechanism in question had been "rigged correctly" and that "no human error" was involved.

Performances of Fuerzabruta, which has been performed around the world since 2005, were cancelled over the weekend and will resume again tomorrow, albeit with the sequence in question missing while investigations continue to determine the exact cause of the equipment failure.

The spokesperson described the incident as "extremely regrettable", adding: "The Roundhouse is committed to the safety and wellbeing 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."