The Federal Police Department in Frankfurt on the Main is searching for a still unknown perpetrator who attacked two travellers with a knife last Saturday evening, around 11.20 pm, in a regional express train shortly before Friedberg station.According to investigations by the federal police so far, the 27- and 38-year-old men from Gießen and the perpetrator had an argument in the train, which was initially carried out verbally. The dispute escalated when the unknown man suddenly pulled out a knife and attacked the two of them. The older of the two victims was seriously injured by stitches in the groin area and on his arms and had to be taken to a clinic by ambulance. Fortunately, the 27-year-old was only slightly injured and could be released after being treated in a hospital.The perpetrator had fled from the train at Friedberg station, across the tracks towards the downtown area. Despite an immediately initiated manhunt in which a police helicopter of the Federal Police was also deployed, the perpetrator could not be caught yet. The fugitive perpetrator was described as an approximately 30-year-old, approximately 175 cm tall man with dark hair and presumably of Arab descent. He was dressed in red trousers and a dark blue T-shirt and sports shoes.Anyone who can give clues about the perpetrator is asked to contact the Federal Police Inspectorate in Frankfurt on the Main by calling 069/130145 1103.