Pope Francis called for "severe punishment" for pedophiles on Sunday after new details emerged in Italy of the 2014 death of a 6-year-old girl who is alleged to have been thrown from an eighth-story balcony by her abuser.

"This is a tragedy. We should not tolerate the abuse of minors," Francis said, departing from prepared remarks at his weekly Sunday message and blessing to tens of thousands of people in St. Peter's Square.

"We must protect minors and severely punish abusers," he said.