COLOMBO, March 22: Police investigations into child-sex allegations against science fiction writer Arthur C Clarke may be called off, a Sunday newspaper reported here today.Clarke, author of the best selling 2001: A Space Odyssey, interviewed by a British tabloid was quoted in the newspaper admitting to paedophilia, but police in the Sri Lankan capital where he lives said they had no evidence to bring charges against him, the Sunday Times reported.The police referred the case last week to the Attorney-General's department after three men, who had reportedly told the newspaper they had sex with the writer when they were adolescents, denied the statements to investigators.Additional Solicitor-General C R de Silva told the newspaper that the case, registered on the basis of Clarke's interview and statements by four others in the Sunday Mirror, will probably soon be dropped.