A woman has been arrested after jumping over barriers and knocking down the Pope at Christmas Eve Mass.
Pope Benedict XVI was attacked as he walked down the main aisle to begin service at St Peter's Basilica at the Vatican.
Vatican spokesman Ciro Benedettini said the 82-year-old quickly got to his feet and was unhurt.
The woman, who appeared to be mentally unstable, was being questioned by Vatican police; also knocked down Cardinal Roger Etchegaray, who was taken to hospital for a check-up.
It was the second year in a row there was a security breach at the service. At the end of last year's Mass a woman who had jumped the barriers got close to the Pope but was quickly brought to he ground by security. Benedettini said it was not immediately known if the same woman was behind the latest incident.