Pope Francis offered a message of hope during his traditional Christmas Day Mass in St. Peter’s Square, telling the thousands who attended the service that “the light of Christ is greater” than the darkness “in human hearts” and “in economic, geopolitical and ecological conflicts.”

Tens of thousands of tourists, pilgrims and Romans gathered for the traditional Christmas message. The pope was flanked by Cardinal Renato Raffaele Martino, president of the papal council for migrants, and Cardinal Konrad Krajewski, the pope’s official almsgiver.

POPE FRANCIS MARKS CHRISTMAS EVE WITH REMINDER THAT GOD LOVES 'EVEN THE WORST OF US'

Pope Francis cited the Syrian people “who still see no end to the hostilities that have rent their country over the last decade” and Israel, where Jesus “was born as the savior of mankind and where so many people -- struggling but not discouraged -- still await a time of peace, security and prosperity.”

The pope expanded on his remarks about migrants, saying they were forced by injustice “to emigrate in the hope of a secure life.” Francis said their injustice continues along their journey toward finding acceptance. The pope said migrants often face abuse, enslavement, and torture in “inhumane detention camps” and death during dangerous sea excursions to find freedom elsewhere.

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Francis called for the easing of crises in Lebanon and Iraq and the “grave humanitarian crisis” in Yemen. He noted that several countries in the Americas are “experiencing a time of social and political upheaval,” citing the strife in Venezuela.

The pope offered prayers for those in several African nations, including where people have been “persecuted for their religious faith.”

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Separately, Francis and two other religious leaders urged the rival factions of South Sudan to maintain a pledge to form a coalition government next year. A peace deal to end a five-year civil war was signed last year but a November deadline to form a coalition government was extended to February as the main aspects of the peace agreement still need to be resolved.

The Associated Press contributed to this report.