WhatsApp has gone down for users across the world in a ‘global outage’.
Downdetector.co.uk recorded more than 68,000 reports about the messaging app.
Mobile and web customers say the app is not ‘connecting’ when they try to send messages.
Some 88% of the problems reported on downdetector are connection-related.
Users have been affected all over the world, including vast swathes of Europe, the US, southern and central America, India and Australia.
WhatsApp is now trending on Twitter, with more than 321,000 tweets about the outage.
The service also went down last month, when thousands of users reported issues.