Investigators to examine safety barriers and crowd control after festival crush

Flowers lie against the south fence surrounding the Astroworld festival grounds (Michael Wyke/PA)

Investigators are expected to examine the design of safety barriers and the use of crowd control in determining what led to a crush of spectators at a Houston music festival that left eight people dead and hundreds more injured.

Authorities planned to use videos, witness interviews and a review of concert procedures to figure out what went wrong Friday night during a performance by rapper Travis Scott.