The service disruption in GCP US East 4 from 1:09am EST to 1:56am EST was caused by a scheduled network change.

This change is normally non-disruptive. The change was executed improperly, causing the disruption.

The oncall team received the alerts, and were advised by the change team as false positives.

In alignment with our change protocol, the service disruption was discovered and remediated by our post change QA team.

We apologize for the disruption, and are confident the issue has been fully resolved.