According to the writer of the book of 2 Kings, when the city was taken over, most of the people still there were taken away by Nebuzaradan, who was the captain of the guard for the king of Babylon. This shows how the people were captured and moved to a new place.
2 Kings 25:11: Now the rest of the people [that were] left in the city, and the fugitives that fell away to the king of Babylon, with the remnant of the multitude, did Nebuzaradan the captain of the guard carry away. [fugitives: Heb. fallen away]
This verse also aligns with 2 Kings 25:11, describing the same event where people are carried captive but is written in a different context.
Jeremiah 52:15: Then Nebuzaradan the captain of the guard carried away captive [certain] of the poor of the people, and the residue of the people that remained in the city, and those that fell away, that fell to the king of Babylon, and the rest of the multitude.