London, Dec. 25: The Gordon Brown Government is set to release top-secret files on hundreds of UFO sightings.

Over 10,000 UFO sightings have been reported to the Ministry of Defence since the project was started in 1950. After the cases were probed, around five per cent are still unexplained.

The Ministry of Defence will release a total of 160 files in Spring 2008, reports The Sun.

Reports suggest the MoD is releasing the documents because there are more UFO Freedom of Information requests than on any other subject.

The tabloid quoted Nick Pope, the head of the MoD’s UFO project from 1991 to 1994, as saying that some of the sightings are “highly credible”.

Pope said: "Whatever people think about UFOs, these documents are fascinating and show how the MoD has researched and investigated this mystery for nearly 60 years, without an answer. " (ANI)