Facebook’s head of global policy management apologized to pro-Donald Trump vloggers Diamond and Silk during a congressional hearing on Tuesday, saying it “badly mishandled” their concerns about allegedly being censored by the social media network.

“Before I close, I do want to acknowledge the video bloggers known as Diamond and Silk,” Monika Bickert said in her opening statement before the the House Judiciary Committee. “We badly mishandled our communications with them, and since then we’ve worked hard to improve our relationship. We appreciate the perspective that they add to our platform.”

The hearing, which featured representatives from Facebook, YouTube, and Twitter, was aimed at examining content filtration and the alleged censorship of conservative voices, Business Insider reported.

Diamond and Silk, whose real names are Lynnette Hardaway and Rochelle Richardson, have repeatedly accused Facebook of bias and of purposely diminishing their public page’s influence on the social media site.

They both spoke at the first hearing in April, though Facebook, Twitter and YouTube declined to attend.

At that hearing, the duo said Facebook never responded to their inquiries about the alleged censorship — a claim the company has disputed.

Ms. Bickert said Tuesday that a notice sent to Diamond and Silk about their page being “dangerous” was sent in error.