This June 6, 2013 file photo shows the National Security Administration (NSA) campus in Fort Meade, Md., where the US Cyber Command is located.
Gunfire broke out at the NSA headquarters in Maryland, local authorities said Wednesday morning.
At least three people were shot and wounded, and one person is in custody, according to local media.
At approximately 7:30 a.m. Wednesday morning, the Anne Arundel County Police Department said in a tweet that there was a "possible shooting near NSA."
The agency said in a statement to local WAPT News that its police department was responding to "an incident that took place this morning at one of NSA's secure vehicle entry gates."
Police are investigating the incident. The NSA is located at Forte Meade, Maryland.
This is a developing story. Refresh for updates.