Karl Pierson, the 18-year-old who opened fire on a high school in Colorado "held strong political beliefs" according to his classmates.
After opening fire at Denver's Arapahoe High School in what the local county sheriff said was most likely a "revenge attack" on a teacher, the teenager fatally shot himself.
A 15-year-old girl was seriously injured in the attack, and two other students were wounded, but have since been released from hospital.
More top news
The EgyptAir plane that crashed into the Mediterranean Sea did not swerve before disappearing off radar, according to Egyptian authorities.
Jose Mourinho is a step closer to being appointed the new Manchester United manager after Louis Van Gaal's turbulent reign was ended.
Greek authorities began to clear the country's largest informal refugee camp on Tuesday - blocking access to the area in the process.