If you're currently experiencing some interruptions with your online gaming sessions over Xbox Live, you're not alone. According to Microsoft's Xbox Live Service Status page, the company is currently investigating issues that are preventing players from signing into Xbox Live. From Microsoft:

Hey Xbox members, are you having an issue signing in to Xbox Live? We are currently working to get this resolved ASAP! Thank you for being patient. We'll post another update when more information becomes available.

The problem seems to be affecting the service on both the Xbox One and Xbox 360, but hopefully it's remedied soon. If you'd like to follow along and receive updates on Microsoft's progress in remedying the issues, you can check out the Xbox Live Service Status page for more. We'll also update this post when all is clear.

Update: It looks like the sign-in issues are all cleared up, but there are still ongoing issues for those playing Galaga through the Xbox One's backwards compatibility feature.