The 1986 Viking Sally murder took place in July 1986, aboard the cruiseferry MS Viking Sally en route from Turku, Finland, to Stockholm, Sweden, when Reijo Hammar (born 1953) killed businessman Antti Eljaala (born c. 1942). The case is particularly notable for two reasons: Hammar was later described as the most dangerous criminal then in Finland, and a year later, on board the same ship another murder took place.