UTC 23:11: The attack has been mitigated on our end.
UTC 20:19: We have discovered that the network activity was due to a DDOS attack. We have isolated the attack and stability is beginning to return to the affected sites. We will update again if and when there is more information.
UTC 19:25: We are currently investigating issues related to strange network activity. This is causing a limited number of sites to load very slowly. We will update when we have more information.