Instagram

The ruling amounts to an immediate ban of Facebook and Instagram in Russia, where both platforms are already blocked. WhatsApp, which is owned by the same company, is still allowed.

Facebook said late Monday that "the root cause of this outage was a faulty configuration change" and that there is "no evidence that user data was compromised as a result" of the outage.

Pinterest will launch an in-app "buy" button, and Instagram will soon target ads using demographic data from Facebook.