2 Chronicles 36:6, 17

King Nebuchadnezzar of Babylon attacked Judah, captured Jehoiakim, put bronze chains on him, and took him to Babylon.

So God brought the king of Babylon to attack them. The king killed the young men even when they were in the Temple. He had no mercy on the young men or women, the old men or those who were sick. God handed all of them over to Nebuchadnezzar.