Thousands of worshippers flocked to St Peter's Square on Sunday to hear Pope Leo XIV deliver his first Easter Mass address as pontiff.

Framed by white roses on the central balcony of the Vatican's basilica, the pope called on "those who have the power to unleash wars" to choose peace.

"On this day of celebration, let us abandon every desire for conflict, domination and power, and implore the Lord to grant his peace to a world ravaged by wars," he said.

The first US-born pope has become a vocal critic of the Iran war, and has used recent public addresses to denounce global conflicts and urge de-escalation.

Pope Leo waved to the crowd gathered in the square below before delivering his "Urbi et Orbi" blessing - Latin for "to the city and the world".