A shoot out at the entrance to Fort Meade, Maryland, which is home to the NSA, National Security Agency’s headquarters, is not believed to be terrorist related, according to the FBI.
Two men dressed as women used a stolen vehicle to ram the gates to Fort Meade around 9.00am local time. A shoot-out ensued leaving one dead and two injured though others dispute the reported death.
BBC News reports "The incident began shortly after 9:00 local time (14:00 GMT) when at least two people attempted to drive the vehicle into the National Security Agency section of the Fort Meade facility, according to a statement released by the Army base's public affairs office."
President Obama was quickly briefed about the incident which took place 22 miles northeast of Washington, D.C.
At time of writing the incident is being treated as a local criminal matter rather than anything more serious.
The shooting was reportedly quickly contained but information at this time is sketchy.
Two men, ages 20 and 44, were injured and flown by medical helicopter to the Shock Trauma unit in Baltimore, according to the Fox affiliate reports CNN.
The latest information is that the two cross-dressed men had been partying with a thrid individual prior the attck. They are accused of taking the third person's vehicle which is confirmed as being reported stolen.
The reason for their arrival at Fort Meade is not known.
Fort Meade is a huge sprawling facility home to thousands of military personnel and their families as well as the USA spy agency the NSA.
The activities of the NSA became public knowledge after Edward Snowden blew the whistle on its spying against citizens. Until that time US authorities had denied its existence.
We will update this breaking news story as updates become available.