Parts of the internet went down across the U.S. and in the U.K. Wednesday morning as service provider Level 3 Communications reported an outage.
Level 3, which provides internet and voice services to businesses, said the company did not yet know the cause of the outage, which temporarily disrupted or slowed service to some customers.
By early afternoon, the company said the network was "operating under normal conditions."
"We continue to monitor for any residual issues stemming from this morning's incident," Nikki Wheeler, senior director of media relations, wrote in an email.
Some users complained on Twitter and Reddit about continued service interruptions into Wednesday afternoon.
As of Wednesday evening, Wheeler said they'd found the issue, which they believed to be "a configuration error."