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 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.