Major social media services including Facebook, Instagram and WhatsApp were hit by a massive outage yesterday.

Users trying to access Facebook in affected areas were greeted with the message: “Something went wrong. We’re working on it and we’ll get it fixed as soon as we can.”

The outage comes a day after a whistleblower went on US television to reveal her identity after she leaked a trove of documents to authorities alleging the social media giant knew its products were fueling hate and harming children’s mental health.