Investigations widen into deadly stampede at Travis Scott’s rap concert

An ambulance is seen in the crowd during the Astroworld music festival. (Courtesy)

At least two investigations, one of them criminal, were underway on Sunday into the deadly stampede during rap star Travis Scott's Astroworld music festival that killed at least eight people and injured dozens in Houston.

Officials in Houston said autopsies on Friday's victims were being performed as soon as possible so their bodies could be returned to family members, with the identities of some of the dead expected to be released on Sunday.