Police are investigating the theft of photographs of the second Potter film, The Chamber Of Secrets.

The pictures were reportedly stolen from a locked room at Leavesden Studios in Watford, Hertfordshire where the movie's currently being filmed.

Other thefts

It's not the first time something like this has happened - in February props were stolen from the set and then appeared for sale on the internet.

And a wizard's hat and three gold coins were taking during the making of the first film, Harry Potter and the Philosopher's Stone.

Because the film has been such a huge success people want to buy anything they can get hold of connected with it.