The Vatican has said it has detained a person it suspects of leaking a series of confidential documents and letters to the media.
The leaks have described alleged corruption, mismanagement, and internal conflicts among top Holy See officials.
The Vatican said the person was being questioned by Vatican magistrates, but gave no further details about their identity.
The "Vatileaks" scandal, as it is known, has enraged the Holy See.
Last month, Pope Benedict XVI set up a special commission of cardinals to investigate the leaks.
"The inquiry carried out by Vatican police… allowed them to identify someone in possession of confidential documents," Vatican spokesman Federico Lombardi told journalists.
"This person is currently being questioned."
In the Vatican dungeons, no doubt.