One man is dead and another severely injured after a shootout at one of the main gates of the National Security Agency located at Fort Meade, Maryland, reports abc News.

Two men dressed as women attempted to "penetrate" the entry point with their vehicle when a shootout occurred, officials said.

"There are indications they were dressed as females," an official said.

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At least one officer suffered non-life-threatening injuries.

One perpetrator is confirmed dead on the scene; the other "severely injured" and probably won't survive, according to one official.

The FBI said they do not believe the incident is related to terrorism.

Aerial images from news helicopters on the scene appear two show two damaged SUVs.