MI6 is investigating how one of its digital cameras containing sensitive terrorism pictures was sold on eBay.
The images on the camera, sold on eBay to a Hertfordshire man, included pictures of terror suspects and details of computer operating systems used by MI6.
The Sun newspaper reports that the camera's memory card held sensitive information about al-Qaeda suspects, fingerprints and suspects' academic records, as well as pictures of rocket launchers and missiles.
The camera also had detailed information about an MI6 computer system.
The Nikon digital camera was put up for sale on the internet trading site and was sold for just £17.
The buyer of the camera is said to have bought the camera for a US holiday. When he returned and processed his pictures he found the bonus prints on MI6.
He handed them into Hemel Hempstead police station, where Special Branch was called in. The camera has now been seized by them.
It is the latest in a series of data breach gaffes by a government department.