A fake twitter message ascribed to a top cardinal announced the death of the pope, a report immediately denied by the Vatican spokesman.
The message, in Italian, said to have been tweeted by Cardinal Tarcisio Bertone, secretary of state and the number two at the Vatican, appeared at around 7:00 pm (7:00am NZT) announcing: "The Holy Father unexpectedly passed away this afternoon. We announce this with grief and consternation.''
It was followed by similar tweets in Spanish, English and French.
Vatican spokesman Federico Lombardi immediately denied the reports, terming them "baseless'' and "unworthy of attention''.
Pope Benedict XVI will turn 85 in April.