With the rising death toll of migrants and refugees attempting the treacherous voyage across the Mediterranean Sea, Pope Francis urged world leaders to act to prevent further tragedy.

"I make a heartfelt appeal to the international community to act decisively and promptly in order to prevent such tragedies from recurring and to guarantee the safety, respect for the rights and dignity of all," the pope said July 22 after reciting the Angelus prayer with an estimated 25,000 people gathered in St Peter's Square.