YouTube, Snapchat, Gmail, Nest, Discord, and a number of other web services suffered from major outages in the US t. The root cause was issues with Google’s Cloud service that powers apps other than just Google’s own web services. Google’s issues started at around 3PM ET / 12PM PT, and the company resolved them after more than four hours.

The issues largely affected those on the East Coast of the US, but some YouTube and Gmail users across Europe also reported that they were unable to access the services. Google’s own G Suite Status dashboard showed problems with practically every single Google web service at one point, and Down Detector listed YouTube outage reports in a number of countries worldwide.

Google blamed “high levels of network congestion in the eastern USA” for the issues. “We will conduct a post mortem and make appropriate improvements to our systems to prevent this from happening again,” says a Google spokesperson in a statement to The Verge. “We sincerely apologize to those that were impacted by today’s issues.”