Intelligence papers on a reported UFO sighting known as the Rendlesham incident" have gone missing, files from the National Archives reveal. The missing files relate to a report of mysterious lights from US servicemen at RAF Woodbridge in Suffolk in 1980. The disappearance came to light with the release of 8,000 previously classified documents on UFOs. Officials found a "huge" gap where defence intelligence files relating to the case should be, the papers show. The incident took place near the fence of RAF Woodbridge - at that time being used by the US Air Force. A group of servicemen reported seeing strange lights in the trees near the base and after investigating found marks on the ground and damage to vegetation. The files reveal the MoD received a request for its own records of the incident in 2000, but when officials looked they discovered a "huge" gap where defence intelligence files relating to it should be. But it is not the only gap in the official record. In 2002 the MoD received a request for information from Lord Hill-Norton. He wanted to know about reports of a UFO sighting made by HMS Manchester while on exercise in the 1990s. It emerged in the file that HMS Manchester's log for one of the periods was lost overboard after "a gust of wind".