A 23-year-old man randomly stabbed five passersby in Villach, a city in southern Austria, on Saturday, police said.
A 14-year-old was killed and four others were injured in the attack.
The suspect was detained by police.
He is a Syrian national with legal residence in Austria, police said.
A 42-year-old man who works for a food delivery company witnessed the incident from his car.
He drove toward the suspect and helped to prevent things from getting worse, police spokesperson Rainer Dionisio told Austria’s public broadcaster ORF.
Police said it wasn’t clear whether the suspect acted on his own and therefore continued to search for potential further suspects.
