It was not immediately clear when the issues would be resolved.
Original report: Facebook officials said the company started investigating issues on the site around 5:30 a.m. EST.
According to downdetector.com, a majority of U.S. users who reported issues with Facebook or Instagram on Tuesday morning were on the east coast. Users reported that pages that were slow to load or failed to load entirely, among other issues.
Check back for updates to this developing story.