Support has poured in for the 21 people who were injured Wednesday morning during a mass stabbing at Franklin Regional Senior High School in Murrysville, Pennsylvania. Four of the injured are listed in critical condition.
Alex Hribal, a 16-year-old sophomore at the school, has been charged with four counts of attempted homicide, 21 counts of aggravated assault, and one count of possession of a weapon on school grounds in the attack. Police say he will be charged as an adult.
As the ordeal unfolded, students, friends and family tweeted their well wishes and requests for prayers, along with pictures from the scene. We've compiled many of those messages and images here:
This selfie was snapped by Nate Scimio, a victim who is being hailed as a hero. Others have praised him on Twitter for pulling the fire alarm during the incident: