(ANSA-AFP) - VIENNA, 16 FEB - Austria's Interior Minister Gerhard Karner said the stabbing by a Syrian migrant in which a 14-year-old teenager died and five other people were injured yesterday in Villach is of "Islamist matrix." "This is an Islamist attack linked to Isis," Karner said at a press conference in the Carinthian city where the attack took place. The minister said the 23-year-old Syrian asylum seeker who carried out the attack had allegedly radicalized online "in a short time." The terrorist had radicalized himself on social media, and particularly on TikTok, where he followed videos of extremist Islamist preachers. This was made known by Austrian police. An Isis flag was also found in the home of 23-year-old Syrian Ahmad G., police reveal. It also emerged that the young man was not under surveillance by security services, despite the fact that the government in Vienna keeps at least 150 potential threats under observation. Federal President Alexander Van der Bellen expressed "dismay," saying that "no words can erase the pain" of the victims and their families. Politicians reacted harshly, and Herbert Kickl, leader of the far-right FpÖ, sharply criticized security management, calling for tougher measures to prevent future attacks. (ANSA-AFP).