London police say they believe a claim made by a man named only as "Nick," who alleges he saw a Conservative member of Parliament kill a boy at a child sex party in the 1980s, The Guardian reports.

Nick, whose real identity is being withheld by police and the media, previously told the Exaro news site that when he was a boy he was taken to child sex parties in the 1980s. He watched a boy being strangled to death in front of him by the unnamed MP. On another occasion, he says he saw another boy killed while a Conservative cabinet member looked on. A third boy is also alleged to have been killed by the Westminster pedophile ring that included senior political figures in the 1970s, '80s, and '90s.

A handful of political figures who have died have subsequently been revealed as child abusers whose position in power appears to have helped them get away with their crimes. They include the late Liberal MP Cyril Smith. Nick also identified one of his alleged abusers at the London parties: The former MI6 Deputy Director Sir Peter Hayman, who died in 1992. Hayman had previously been named in Parliament by Geoffrey Dickens, the late MP who tried to investigate child abuse in Westminster.