As part of a transcultural investigation of injuries due to deliberate violence in Denmark and South America, homicides in the Copenhagen area were studied for a 1-year period. Forty-five cases corresponding to a rate of approximately 2/10(5) per year were recorded. The rate seems to be increasing and the pattern changing with a higher frequency of stabbing and with an increasing frequency of high blood-alcohol concentrations in the victims. The highest number were killed at home. In the majority of cases the aggressor and the victim knew each other. A reduction in alcohol consumption is indicated as a possible preventive measure.