Aleksandr Ivanovich Berlizov (Russian: Александр Иванович Берлизов; 12 October 1946 – summer 1974) was a Soviet serial killer who operated in Tikhoretsk and Dnipropetrovsk. He was known as The Night Demon.

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Ion Rîmaru ([iˈon rɨˈmaru]; modern spelling Râmaru; 12 October 1946 – 23 October 1971) was a Romanian serial killer dubbed the Vampire of Bucharest (Vampirul din București) or the Blondes' Killer (criminalul blondelor). Rîmaru terrorized Bucharest between 1970 and 1971, killing four women and attacking more than ten others.