Three UK suffered a network outage earlier today, leaving tens of thousands of its users offline.

At its peak at around 11:00 am (GMT), DownDetector reported that just under 13,000 people suffered from network issues.

Three also experienced network issues on Friday, Saturday, and Sunday.

The telco, which is set to complete a £15 billion ($18.5bn) merger with Vodafone this year, has apologized for the outage.

"Following an issue with our network that started earlier, services are now recovering," the company said on social media site X, formerly Twitter, this afternoon.

"We know a number of our customers are still waiting on their service to be restored, and our engineers are working to fully fix it.

"Our customer services are still impacted and unavailable, so please check back here for the latest updates We are very sorry for the issues with service over the past few days and sincerely apologize for any inconvenience caused."

Back in December, Three confirmed to DCD that a technical issue at one of the company's data centers was to blame for a network outage earlier that month.