2 Kings 25:1-3

Now in the ninth year of his reign, on the tenth day of the tenth month, Nebuchadnezzar the king of Babylon came, he and all his army, against Jerusalem, camped against it, and built a siege wall all around it.

So the city was under siege until the eleventh year of King Zedekiah.

On the ninth day of the fourth month the famine was so severe in the city that there was no food for the people of the land.