We’re aware that some people are having trouble accessing our apps and products. “We know that people were unable to use to connect with their friends, family, businesses, community groups, and more today - a humbling reminder of how much people and organizations rely on our app every day,” Cathcart wrote in the tweet. On Tuesday morning, WhatsApp head William Cathcart also took to Twitter to announce that the service was “back up and running” but did not elaborate on what might have caused the problems.

Service were not restored until several hours later in what Downdetector described as “the largest outage we’ve ever seen”. Outage tracking website said it had received 10.6 million reports of problems ranging from the United States and Europe to Colombia and Singapore, with trouble first appearing at about 15:45 GMT. “We’ve been working hard to restore access to our apps and services and are happy to report they are coming back online now.”

“To the huge community of people and businesses around the world who depend on us: we’re sorry,” Facebook said. In a post on rival platform Twitter on Monday evening, Facebook confirmed its apps were coming back online and apologised to users for a blackout that affected millions of people across the world. Facebook, Instagram and the widely-used WhatsApp messaging service are gradually returning to normal after an hours-long global outage that disabled the Facebook-owned social media platforms for some six hours.

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