Pope Francis on Monday (February 3) decried the deaths of children in global conflicts, telling a Vatican summit that "nothing is worth the life of a child."

Francis, who has been critical of both Israel's military campaign in Gaza and the ongoing violence of the Russia-Ukraine war, did not specify a conflict in his remarks.

The Vatican, shaken in recent decades by child sexual abuse scandals in countries across the world, invited a range of global leaders on Monday for a one-day conference to discuss children's rights.

Queen Rania of Jordan, Italian Foreign Minister Antonio Tajani, and former Indonesian President Megawati Sukarnoputri, were among the speakers.

Francis ramped up his criticism of Israel's military campaign in Gaza in recent months, before the January ceasefire agreement. A few weeks ago, he called the humanitarian situation in the Palestinian enclave "very serious and shameful."

In Monday's speech, he also decried the number of children displaced by global conflicts, which the United Nations estimates at some 38 million.

Francis, who has been sharply critical of U.S. President Donald Trump's clampdown on immigration, also mentioned undocumented children at the U.S.-Mexico border.