Five people are killed and six others injured in a mass shooting at a university in Perm, Russia.
Four civilians are killed and 22 others injured after a gunman opens fire in six locations in the streets of Vienna, Austria, near the central Schwedenplatz square. The Interior Minister described it as a "terror attack". The attacker was shot dead, and is identified as an Islamic State supporter who tried to join the group in Syria.
The United States Department of Justice announces charges against six current and former Russian military officers for allegedly attempting to engage in malware and hacking in the 2018 Winter Olympics and elections in other countries.
A mass shooting takes place at a courthouse in New Castle County, Delaware, United States, where a gunman shot and killed two women and injures two police officers. He is later found dead at the scene.