Agents from Homeland Security Investigations found an additional 200,000 SIM cards at a location in New Jersey, law enforcement sources told ABC News.

Agents discovered electronic devices in five locations in and around the city that could be used to disable cellphone towers. The system could also be used for criminal activities.

Could you imagine if I brought my authentic New York self to every interrogation I did?” former Secret Service agent Evy Poumpouras asked on a recent podcast.

While close to 150 world leaders prepared for the U.N. General Assembly, the U.S. Secret Service was quietly dismantling a massive hidden telecom network across the New York area.

The Secret Service thwarted a massive telecom threat near the United Nations that could have disrupted New York City's communications.

The U.S. Secret Service has dismantled a massive hidden telecom network in New York. Investigators say the system could have crippled cell towers and jammed 911 calls.

A Secret Service unit set out to unmask the layers of burner phones, changing phone numbers and SIM cards that were swatting American officials. It ended with the largest seizure of SIM servers and ...

All the devices were found within 35 miles of the United Nations General Assembly meeting of world leaders in New York City that kicked off on Monday, September 22. The Secret Service release said its ...

Law enforcement experts said the sniper-type shooting at a Dallas ICE facility is part of a frightening trend.

Secret Service seized 300 SIM servers and 100,000 SIM cards that could have shut down the cellular network in New York.

At Routh's trial, Robert Fercano, who was a Secret Service agent helping protect Trump on the golf course, testified that he spotted Routh before Trump came into view. Routh aimed his rifle at the ...