Charles Ellicott Commentary 2 Kings 25:18-19

"And the captain of the guard took Seraiah the chief priest, and Zephaniah the second priest, and the three keepers of the threshold: and out of the city he took an officer that was set over the men of war; and five men of them that saw the king`s face, who were found in the city; and the scribe, the captain of the host, who mustered the people of the land; and threescore men of the people of the land, that were found in the city." — 2 Kings 25:18-19 (ASV)

List of the chief personages taken by Nebuzaradan in the Temple and the city of David. This notice may be regarded as an indirect proof that the upper city was not captured before.