Terrorism & Active Shooter

A student opened fire inside a Dallas-area high school during a fight, injuring four people before he fled, authorities said Wednesday.

Police blocked roads to the school and numerous emergency vehicles were on the scene.

A 22-year-old man who shot and killed five people in Plymouth before turning the weapon on himself had a gun license, police said.

A gunman is believed to have shot and killed an officer and another person in a shopping district in a Denver suburb Monday before being fatally shot by police, authorities said.

One person was killed and 12 others injured in reported drive-by shootings over a 90-minute span Thursday in three cities west of Phoenix, authorities said.

A shooting in a busy entertainment district in downtown Austin, Texas, injured 13 people early Saturday.

Barron County Emergency Services recently created a countywide Rescue Task Force capable of responding in the event of a an active shooter.

A large police presence could be seen after three officers were shot responding to a call, Wilmington police said.

A firefighter killed a co-worker and wounded another at their small fire station before setting his own home ablaze and apparently killing himself.

The nearly 4 1/2 minutes of footage is from one deputy who arrived minutes after the first shooting reports and while shots were still being fired.