U.S. Senator Blumenthal calls on Facebook's Zuckerberg to testify

FILE PHOTO: Facebook Chairman and CEO Mark Zuckerberg testifies at a House Financial Services Committee hearing in Washington, U.S., October 23, 2019. REUTERS/Erin Scott/File Photo

WASHINGTON (Reuters) - U.S. Senator Richard Blumenthal, a Democrat, called on Wednesday for Facebook Chief Executive Officer Mark Zuckerberg to testify at a hearing about how its subsidiary Instagram affected children.

(Reporting by Diane Bartz; Editing by Chris Reese)