Iran has upped the ante in its hostile relationship with the United States as an intercepted communication revealed that the Islamic Republic made threats against Fort McNair and the Army’s vice chief of staff.

As first reported by the Associated Press, the National Security Agency (NSA) intercepted messages in January from Iran’s Islamic Revolutionary Guard Corps (IRGC). In the messages, IRGC members discuss attacking Ft. McNair, an Army base located on the Potomac River just about a 10-minute drive from the White House.

The Iranians discussed using a boat loaded with explosives, killing the Army’s Vice Chief of Staff General Joseph Martin while infiltrating and surveilling the base. The method harkens back to al-Qaeda’s attack on the USS Cole.