Some users spreading disinformation were government empoloyees, Facebook said.

Even end-to-end encryption can’t protect WhatsApp users’ messages if someone has physical control of their device — a problem this update should help solve.

About 2 million accounts followed at least one of the pages, and nearly $30,0000 in advertising spending was tied to them, Facebook said.

Two big hires were announced on the same day news broke that Facebook paid users between 13 and 35 years old up to $20 to install an app that collected data on their private messages in social media apps, photos and videos, emails, browsing history, location information and other data.

The reports, released by the Senate Intelligence Committee, represent the most comprehensive independent analyses of the 2016 Russian disinformation effort.

Facebook says the bug existed for 12 days and was fixed promptly after discovery on Sept. 25.