Instagram has stopped working, with users unable to see see new posts.
The app instead shows an error reading "could not refresh feed".
The website version of Instagram also appeared to be broken. Users reported seeing a "5xx Server Error" message when they attempted to open pages, rather than seeing any photos.
Issues were particularly focused in the UK and the east coast of the US, according to tracking site Down Detector. But they were reported across much of the world.
Instagram was hit by another outage just a few days ago, though there is nothing to suggest the two are linked.
The new outage came almost immediately after a major problem with Google Calendar, which left users looking at error messages instead of their schedules.
