'My mistake, I'm sorry,' Facebook's Mark Zuckerberg to tell Congress: Prepared text

Lima : Mark Zuckerberg, chairman and CEO of Facebook, speaks at the CEO summit during the annual Asia Pacific Economic Cooperation (APEC) forum in Lima, Peru, Saturday, Nov. 19, 2016. AP/PTI(AP11_19_2016_000287B)

Facebook chief Mark Zuckerberg will accept responsibility for the social network's failure to protect private data and prevent manipulation of the platform, according to testimony released on the eve of his first Congressional appearance.

"We didn't take a broad enough view of our responsibility, and that was a big mistake. It was my mistake, and I'm sorry," Zuckerberg said in his written testimony released by a House of Representatives panel.

"I started Facebook, I run it, and I'm responsible for what happens here."

Zuckerberg is to testify before senators tomorrow, and a House panel on Wednesday.