According to previous information, there was a threat between two men in Erfurt's town park this evening. The 35-year-old offender subsequently pulled a knife and injured the injured person on his left forearm. The 17-year-old injured man then fled to Erfurt main station, followed by the perpetrator with a knife in his hand. The procedure of the perpetrator led to a disturbance of the visitors of Erfurt main station and a corresponding number of emergency calls. The perpetrator, known to the police, was arrested after considerable acts of resistance and transferred to the psychiatric department of an Erfurt hospital. The Erfurt Criminal Investigation Department has started further investigations.