As soon as they boarded the train, one of the men spat on a woman and pushed another passenger aside. In the tram, both people screamed, stood on the seats, and hit the windows. When the later victim tried to inform the police, the aggressors attacked him immediately. One of the men pulled out a knife and stabbed the man several times. This injured his arms, neck and shoulder, which had to be treated in the hospital. When the alerted police officers arrived, one of the perpetrators beat another passenger. Only with the use of pepper spray could both men be overcome and arrested.