CHARLEROI (Belgium), June 8 — Work to demolish a Belgian property where Marc Dutroux, one of history’s most notorious serial killers, sequestered young girls began yesterday, to make way for a memorial to victims of paedophilia.

Known as the “house of horror”, the rundown cluster of buildings in the city of Charleroi is where Dutroux was arrested in August 1996 after a 14-year-old went missing and was found alive cowering in the basement along with a girl of 12.