Facebook, Instagram and Messenger are down for some users around the world, following similar outages that affected billions last month.
It is not clear what the cause of the problem is at this stage.
So far it isn’t believed to be seriously affecting Australian users.
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Instagram posted a message on Twitter acknowledging the issue.
“We’re aware some of you are having trouble accessing our messaging apps at the moment,” the company said.
“We’re working to fix things as quickly as possible. Sorry for any inconvenience, and hang tight!”
Messenger also posted.
“No, your wifi isn’t out. We’re working to get things back to normal as quickly as possible,” they wrote on Twitter.
More to come.