YouTube went down on Friday morning.

The massively popular video site, which is owned by Google, was experiencing issues as of about 9 a.m. ET. Those attempting to use the site were greeted with this message:

According to Down Detector, which tracks web outages, the issues seemed to be concentrated in the US, particularly in the Northeast. YouTube's app also appeared to be experiencing issues.

By 9:30 a.m., the site and app were up and running for many people.