Catholics and Jews have gathered outside the Colosseum in Rome in a candlelit vigil to decry attacks on Christians in the world, especially in the Middle East and in Africa.

Italy's minister for international cooperation, Andrea Riccardi, says the attacks target Christians because they are "men of peace."

Riccardi contended Wednesday night that there is practically "religious purification" being waged in places against Christians. Joining Catholic figures at the ancient arena were Italian Jewish leaders in a show of solidarity.