After this article was posted, the Department of Homeland Security, at the ICS CERT website, https://ics-cert.us-cert.gov/alerts/IR-ALERT-H-16-056-01, has concluded that, "Through interviews with impacted entities, the team learned that power outages were caused by remote cyber intrusions at three regional electric power distribution companies (Oblenergos) impacting approximately 225,000 customers. While power has been restored, all the impacted Oblenergos continue to run under constrained operations. In addition, three other organizations, some from other critical infrastructure sectors, were also intruded upon but did not experience operational impacts."