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Vatican City • A Vatican cardinal has caused a stir at a meeting of the world's bishops by screening an alarmist video about the inroads that Islam is making in Europe and the world.

Cardinal Peter Kodwo Appiah Turkson, the Ghanaian head of the Vatican's office for justice and peace, aired the YouTube clip this weekend during the synod of bishops, a three-week gathering of top churchmen to map out strategies to halt the decline of Christianity.

The Rev. Thomas Rosica, who briefed journalists on the closed-door session, said some bishops questioned the statistics and appropriateness of it being aired. Vatican Radio called the clip a "4-year-old, fear-mongering presentation of statistics" that have been widely debunked.

News reports said Turkson subsequently apologized, saying he didn't mean to cause any harm.