A sport utility vehicle carrying two men dressed as women tried to crash a gate near NSA headquarters in Fort Meade, Md., today, resulting in a gunfight that left one of the alleged assailants dead.

Police opened fire on the SUV when it refused to stop, killing one of the two occupants and wounding the other, whose condition was not readily available, according to a USA Today report.

The NSA location in Fort Meade houses 40,000 workers — 11,000 military and 29,000 civilian — and is located about 25 miles northeast of Washington, D.C.

An NSA police officer was also wounded in the attack, and his condition was not available either.

The FBI does not believe the incident was a terrorist attack. It happened when the men attempted to drive the SUV onto NSA property without authorization, and they were prevented from doing so by security personnel.

Agents will be working with the U.S. Attorney’s office in Maryland to determine if federal charges will be filed. Authorities found cocaine and a weapon inside the SUV. The names of the men were not released.