Security guard in custody following deadly shooting at Northrop Grumman near BWI Airport

A contracted security guard was taken into custody following a deadly shooting of another security guard on Wednesday at the Northrop Grumman facility near BWI Marshall Airport, according to police.

Officers responded around 3:30 p.m. to the shooting in the facility's office area in Linthicum, in Anne Arundel County. Police said the shooting was an "isolated incident" between two armed security guards.

The suspect could be facing first or second-degree murder charges, according to police.

The shooting started with a verbal dispute, and it ended quickly, Anne Arundel County police spokesperson Marc Limansky said. A third person intervened.

Police said there were employees in the building at the time of the shooting.

What is Northrop Grumman?

Northrop Grumman is an aerospace and defense company that designs and manufactures systems for aeronautics, defense, missions, and space, according to its website.

According to the General Services Administration, Northrop Grumman is the fifth-largest contractor of the U.S. federal government.

It's main headquarters is in Falls Church, Virginia.