One man has been killed and another was seriously wounded after a shooting at a gate to the US National Security Agency headquarters near Washington. NSA officials fired on a vehicle that refused to follow commands and charged a police vehicle blocking the road. One of the cars occupants died while the other was injured and taken to a local hospital. 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. The NSA in a rare public statement, said that the driver refused to obey an NSA police officers command to exit the secure area. The vehicle charged toward the NSA vehicle which it smashed into as police fired on it, the statement said. The FBI has taken the lead on the investigation. “We do not believe it is related to terrorism”, FBI Baltimore spokeswoman Amy Thoreson told the BBC. President Barack Obama was briefed on the incident, according to White House officials.