A Congressional committee has launched an investigation into the promoter of the Astroworld music festival in Houston, in which 10 people were killed during a massive crowd surge and attendees were packed so tightly that many could not breathe or move their arms.

The House Oversight and Reform Committee sent a letter Wednesday to Live Nation Entertainment Inc.’s president and CEO, Michael Rapino, asking for information about the company’s role in the Nov. 5 festival and concert by rap superstar Travis Scott.

Also Read | Travis Scott offers to pay for funeral after Astroworld mishap, families turn it down

Information the committee requested included details about security, crowd control and mass casualty incident planning; details about any pre-show briefings by Live Nation or is subsidiaries on any safety concerns raised before the concert; and what steps the concert promoter will take to prevent injuries or deaths at future events.

Also Read | USA should prepare itself for omicron tidal wave

“Recent reports raise serious concerns about whether your company took adequate steps to ensure the safety of the 50,000 concertgoers who attended Astroworld Festival,” the committee said in the letter.

Also Read | Travis Scott sued by family of boy who died of Astroworld crush injuries

The committee is requesting that Live Nation provide documentation on the questions by Jan. 7 and that it provide a briefing to committee members by Jan. 12.

Such a briefing to the committee would be behind closed doors and not open to the public.

Also Read | Data shows men more likely to die of COVID than women

A Live Nation spokeswoman did not immediately reply to an email seeking comment.

The youngest of the 10 victims was 9-year-old Ezra Blount. The others who died as headliner Scott took to the stage ranged in age from 14 to 27.

Also Read | Anthony Fauci admits USA didn’t anticipate omicron’s extent of mutation

Some 300 people were injured and treated at the festival site and 25 were taken to hospitals.

Last week, officials announced that the people killed at the concert died from compression asphyxia. A medical expert says the pressure from the crowd surge at the event was so great that it quickly squeezed all the air from the lungs of the victims, causing them to pass out within a minute or so and die because critical organs, such as the heart and brain, were depleted of oxygen.