Lawmakers mentioned Monday that they’ve issued subpoenas to the CEOs of X, Snap and Discord to compel the executives to testify on a listening to relating to on-line baby sexual exploitation.

Sens. Dick Durbin, D-Sick., and Lindsey Graham, R-SC, mentioned they issued the subpoenas to the executives after “repeated refusals to look throughout a number of weeks of negotiations.”

“For the reason that starting of this Congress, our Committee has rallied round a key bipartisan subject: defending kids from the risks of the net world,” the senators wrote in a joint assertion. “It is on the high of each dad or mum’s thoughts, and Massive Tech’s failure to police itself on the expense of our children can not go unanswered.” 

The senators mentioned the Senate Judiciary Committee required the help of the U.S. Marshals Service to personally serve the subpoenas to Discord and X, which they characterised as “a outstanding departure from typical apply.”

“At our February listening to on defending kids’s security on-line, we promised Massive Tech that they’d have their probability to elucidate their failures to guard youngsters,” Durbin and Graham wrote. “Now’s that probability. Listening to from the CEOs of a number of the world’s largest social media corporations will assist inform the Committee’s efforts to handle the disaster of on-line baby sexual exploitation.”

Wifredo Fernandez, the pinnacle of U.S. and Canada authorities affairs at X, previously Twitter, informed CNBC in an announcement that the corporate has “been working in good religion to take part within the Judiciary committee’s listening to on baby safety on-line as security is our high precedence at X.”

“At the moment we’re speaking our up to date availability to take part in a listening to on this necessary subject,” Fernandez mentioned.

Discord and Snap did not instantly reply to requests for remark.

The senators mentioned they’ve additionally been speaking with Meta and TikTok. They mentioned they count on Meta CEO Mark Zuckerberg and TikTok’s Shou Zi Chew to testify voluntarily in the course of the Dec. 6 listening to.

WATCH: CNBC’s full interview with X Corp. CEO Linda Yaccarino