Skype suffered a global outage on Wednesday, leaving millions of people unable to log into the service.
The company said it was looking into the matter, which continued into the early afternoon. "Some of you may have problems signing in to Skype - we're investigating, and we're sorry for the disruption to your conversations," it wrote on its website.
Frustrated Skype users took to Twitter to confirm the outage, which takes place at a particularly inopportune time for Skype: the outage occurs just as holiday-related phone calls reach their annual peak.
Last month Skype set a new usage record," hosting 25 million people on its service concurrently. Around 500 million people use Skype, according to a filing it issued in conjunction with its upcoming initial public offering.