The Catholic Church's 17 new cardinals must dedicate their lives to being ministers of forgiveness and reconciliation in a world - and sometimes a Church - often marked by hostility and division, Pope Francis has said.

Even Catholics are not immune from "the virus of polarisation and animosity", the Pope told the new cardinals, and "we need to take care lest such attitudes find a place in our hearts."

Creating 17 new cardinals from 11 nations, the Pope said the College of Cardinals - and the Catholic Church itself - must be a sign for the world that differences of nationality, skin colour, language and social class do not make people enemies, but brothers and sisters with different gifts to offer.