Apart from a criminal investigation by an internal Vatican tribunal, the pope has ordered a separate administrative enquiry to try to determine the source of the leaks.

BBC: Vatican launches criminal probe into unauthorised leaks

The Pope's private secretary, Georg Gaenswein, also gave evidence, testifying about the daily routines of the papal household and the moment he began to suspect Mr Gabriele as the source of the leaks.

BBC: Opening court session in Vatican, 29 Sep 12

Harvard University offered its first public explanation Monday for its decision to secretly search the email accounts of resident deans last fall in pursuit of the source of media leaks about a cheating scandal that was roiling the campus at the time.

WSJ: Harvard Explains Secret Email Search

Its police force, the Gendarmerie, is hunting for the source of an unprecedented string of leaks, most of them apparently intended to get Pope Benedict XVI to dismiss Tarcisio Bertone, who as secretary of state is the Vatican's most senior official.

ECONOMIST: Vatileaks