Eight people ranging in age from 14 to 27 were killed and dozens were injured at the Astroworld festival in Houston on Friday night, when fans were crushed against the stage.
Organisers of what turned out to be one of the deadliest live music events in US history are facing mounting questions about why the rapper Travis Scott continued performing when first responders were already dealing with a mass casualty event.
Eyewitness accounts of how warnings were allegedly ignored could be features of at least two investigations, one of them criminal.
Astroworld: questions over why Travis Scott played on as crush developed