The Secret Service said Tuesday it dismantled a network of hundreds of servers capable of interrupting telecommunications across the tristate area during the United Nations General Assembly this week. This network could have been used to knock cellphone towers offline, enable encrypted communications among bad actors and carry out anonymous digital attacks that overwhelm services, officials said. The Secret Service said the investigation is ongoing, but it found preliminary signs of “cellular communications between nation-state threat actors and individuals known to federal law enforcement.” The agency did not specify which entities, how many sites were involved or how it discovered them. Authorities said this “represented an imminent threat to the agency’s protective operations,” including for senior U.S. officials. “The potential for disruption to our country’s telecommunications posed by this network of devices cannot be overstated,” Secret Service Director Sean Curran said in a statement.