US Congress has sent formal letters to the CEOs of Twitch, Steam, Reddit, and Discord, inviting them to testify at a committee hearing about the "radicalization of online forum users," following the assassination of Charlie Kirk earlier this month. "To prevent future radicalization and violence, the CEOs of Discord, Steam, Twitch, and Reddit must appear before the Oversight Committee and explain what actions they will take to ensure their platforms are not exploited for nefarious purposes." Discord told the news outlet, however, that, following an internal investigation, the company found "no evidence that the suspect planned this incident or promoted violence on Discord". Neither Twitch nor Valve has publicly confirmed whether their CEOs will attend the hearing. GamesIndustry.biz has reached out to Twitch, Discord, Reddit, and Valve for comment on this story.