Facebook appears to be offline, internationally. The social network isn't working on web or mobile, and even its developer platform is down. Facebook is yet to offer an explanation on its own site or via Twitter.
Facebook is unavailable in the US and Europe, and parts of Asia appear to be missing the service too.
Update 04:24: As mass panic sets in around the globe, status trackers across the internet are straining under the weight of demand. Downrightnow is already a goner.
Update 04:27: And... we're back! The site was down for a little over 20 minutes total.