"We're aware that some people are having trouble accessing our apps and products," Facebook said on Twitter. "We're working to get things back to normal as quickly as possible, and we apologize for any inconvenience."
Outage tracking site Down Detector logged tens of thousands of reports for each of the services. Facebook's own site would not load at all for about an hour on Monday; Instagram and WhatsApp were accessible, but could not load new content or send messages.
