Police discovered a hand-painted Islamic State flag in the room of the Afghan teen who attacked passengers on a train in Germany. The group claimed responsibility, releasing a video in which the alleged perpetrator promises to conduct an attack.
Islamic State (IS, formerly ISIS/ISIL) has said the attacker was one of its fighters, according to IS-affiliated Amaq news agency. The agency later released a video, allegedly showing the axe attacker. Identifying him as Muhammad Riyad, IS called him a "soldier of the Caliphate."
In the video, the alleged perpetrator reportedly called on Muslims who couldn't reach IS strongholds in Syria and Iraq to conduct attacks in their own countries. The young man, whose identity cannot be immediately verified, is seen wielding a knife in a screenshot from a video which is circulating on social media. He reportedly claimed he would use the weapon in a slaughter to avenge the killings of people in Muslim countries.