On 28 May 2006 the "Sunday World" newspaper based in Dublin published further allegations emanating from Ingram. The story concentrated on an undated document purporting to be a transcript of a conversation between McGuinness and an MI6 agent circa 1990. The document describes a conversation in which the IRA "proxy bomb" strategy is discussed- the "proxy bomb" being a method of attack where a human being is strapped into an explosive packed vehicle, then forced to drive to a British Army vehicle checkpoint before detonation.