The company said the determination was made based on the nature of the fiber cuts, the extent of damage, and the makeup of impacted customers. In all, more than 50,000 residential customers and more than 500 business customers were affected for up to 30 hours.

Thirteen cables were severed in the June 15 incident, cutting service to a U.S. military base, 911 and other emergency dispatch centers, fire and police departments and healthcare facilities.

Charter Communications has deemed a June 15 attack on its communications network in Van Nuys an act of domestic terrorism, “based on the nature of the fiber cuts, extent of damage and makeup of impacted customers.