Vienna – There was a knife attack on Gudrunstrasse in Favoriten on Friday evening. Three friends, 23, 30 and 37 years old, were walking in the evening when they were harassed by a large group of unknown men. One of the men from the group of around 15 walked up to the 37-year-old and hit him in the face with his fist. When the 23-year-old intervened to break up the argument, he was also attacked. The perpetrator knocked out two of his teeth. The attacker then pulled out a knife and stabbed the young man. The 23-year-old suffered a stab wound to his thigh.