At around 10.30pm, rescue services were alerted police to a man with a stab wound on Grand-Rue in Ettelbruck.
A verbal dispute between two men had escalated into a fight, during which one of them suffered a minor knife wound to his upper thigh.
He was taken to hospital. A search for the other man was unsuccessful, and an investigation is under way.
Earlier, at around 9pm, police were called to Place de la Gare in Luxembourg City following a confrontation between three men.
According to initial findings, one of them had his headphones stolen. The other two tried to flee but were caught shortly afterwards, and all three were taken to the police station.
