Dear colleagues, Between 05:10 and 06:10 UTC today, multiple root operators including K-root received an unusually large amount of query packets. We believe the event was similar to the events that took place yesterday, 30 November 2015. Following our investigation into this, we enabled counter measures shortly before 06:00 UTC. The query load dropped to normal levels at 06:10 UTC. Our post mortem report of yesterday's event will include today's occurrence. Kind regards, Romeo Zwart