The family of a nine-year-old boy who was seriously injured in the tragedy at the Astroworld festival in Houston this weekend is now suing rapper Travis Scott.

The lawsuit is the latest in a series of lawsuits against, among others, Scott and the organizer Live Nation after the festival, which claimed the lives of eight people and injured hundreds.

It was during Travis Scott's concert on Friday that congestion arose when the audience began to push forward towards the stage.

According to the nine-year-old boy's family, he has very serious liver, kidney and brain damage, receives life-sustaining care and is in a medical coma.

"A nine-year-old child was suddenly forced to witness the horror of how concertgoers were injured and killed as a result of the congestion," they write in the lawsuit that Rolling Stone has read.

In the clip above, you hear the boy's grandfather.

A total of about 40 lawsuits

The family is now claiming more than 8.5 million in damages, partly because Scott and Live Nation did not stop the concert until 40 minutes after the chaos broke out.

In total, almost 40 lawsuits have been filed so far, where the organizers are accused of insufficient security measures, even though they knew that the concert risked becoming messy.