vatican city

The pope, an outspoken advocate for refugees and migrants, urged the international community to set aside its differences and turn its attention to crises around the world.

"It pains me greatly, when I celebrate Mass here in the square or in the basilica, to see so many cellphones raised," said the pontiff. He noted that priests and bishops do it, too.

The Vatican says the State Department alerted it last month that one of its diplomats may have broken a law "relating to child pornography images." The priest in question is now in Vatican City.

The Democratic presidential hopeful said it was worth it to take time away from the campaign trail to attend a Vatican conference on social and economic justice.