WASHINGTON — The House and Senate intelligence committees are inviting tech giants Facebook, Twitter and Alphabet — the parent company of Google — to appear for public hearings as part of their investigations into Russia’s interference in the 2016 election, The Associated Press has learned.

The House intelligence committee is planning to hold a hearing in October and the Senate intelligence committee has invited witnesses to appear Nov. 1. The announcements of public hearings come the day before Twitter is scheduled to hold closed-door staff briefings with both panels.

Rep. Adam Schiff of California, the top Democrat on the House intelligence committee, confirmed the House hearing in an interview, though he noted a date had not yet been set.

In a joint statement, Schiff and Republican Rep. Mike Conaway from Texas, who is leading the House investigation, said they will hold an open hearing in the coming month “with representatives from tech companies in order to better understand how Russia used online tools and platforms to sow discord in and influence our election.”

The hearings come as both panels have been scrutinizing the ways that the social media platforms and online ads were used by Russians to influence the election. The committees are examining the spread of false news stories and propaganda and whether anyone in the U.S. helped target those stories to specific users on social media platforms.