Active Shooter

A shooter opened fire inside a manufacturing facility in western Maryland Thursday afternoon, killing multiple people, authorities say.

The Georgia-based company says the bookshelves can be used to provide additional defense during an active shooter incident.

Crowds packed into Barclays Center for a high-profile boxing match ran for safety after rumors spread of a gunman in the area.

The lockdown at Washington, D.C.’s Joint Base Anacostia-Bolling was lifted after an armed man was taken into custody.

When we hear a news report about an “active shooter,” it triggers an emotional response. But what exactly do the police and FBI mean when they refer to an active shooter? In this installment of LXplanation, we define a term that has become all too common as mass shootings and gun crime have surged in the U.S.

The Pentagon was temporarily put on lockdown Tuesday morning after multiple gunshots were fired and an officer was fatally stabbed near a platform by the facility’s Metro station.

NBC 6’s Julie Leonardi has the latest on what officials are saying after the wild scene late Sunday evening.

Officials located a suspect they said shot at park rangers in Everglades National Park Sunday night.

Officials located a suspect they said shot at park rangers in Everglades National Park Sunday night.

A naval air station in Texas went on lockdown Thursday morning after an active shooter was reported near one of the facility’s gates.

NBC 4 reporter Adam Kuperstein was giving a live on-air update on an active shooter situation in Jersey City this afternoon when gun shots began to intensify, sending him and a video journalist running.⁠

A police officer and three civilians were killed during a shootout in Jersey City which also left the two suspects dead, law enforcement officials said. According to senior law enforcement officials, the Tuesday afternoon shootout began when a detective saw a U-Haul truck possibly linked to the murder of a livery driver over the weekend in Bayonne. As the officer…

Two people were killed and one was injured before a gunman killed himself in a shooting at the Pearl Harbor Naval Shipyard in Hawaii Wednesday.

At least two people were killed and others were injured in a shooting at the University of North Carolina at Charlotte Tuesday. Police said a suspect was taken into custody. This is a developing story.

Four people are dead, including the gunman, following a shooting at a Fifth Third Bank building in downtown Cincinnati Thursday. The shooter has not been identified and it wasn’t clear if the victims were targeted, police said.

The woman suspected of opening fire at YouTube’s headquarters Tuesday wounded 4 people before shooting and killing herself, San Bruno Police Chief Ed Barberini said.

Police are responding to reports of gunshots near the YouTube headquarters in San Bruno, Calif.

Joint Base Andrews was locked down for nearly three hours Thursday after someone mistook a security exercise for an actual threat, officials said.