Pope Leo XIV travelled on Tuesday to the Algerian city of Annaba, the one-time home of Christian theologian Saint Augustine, in the first trip ever by a pontiff to the north African country.

US President Donald Trump has feuded with Pope Leo XIV over the Iran war -- setting off an unholy row that could have serious political implications for the Republican leader at home.

Pope Leo XIV said Monday he had "a moral duty" to speak out against war and didn't "fear" President Donald Trump while the US leader criticised his calls for an end to the conflict in the Middle East.