A teenager was killed and three people wounded in a shooting following a California high school graduation ceremony Wednesday evening, according to authorities.

An 18-year-old student was killed and three others wounded, including an 11-year-old, during a high school graduation event in Fairfield, California.

A Florida high school senior described as a “sweetheart” and a “friend to everyone” was killed in a car crash – hours before he was set to receive his diploma. Christopher...