US military forces are looking for new targets after bombing shut 50 caves and levelling 60 buildings at Zawar Kili.
US warplanes have conducted near-daily strikes since last Wednesday at the site where al-Qaida fighters once operated.
Pentagon officials say they are now looking for another al-Qaida complex to attack.
"We're coming to a conclusion in this particular complex and we'll probably look for another complex," Pentagon spokesman Rear Admiral John Stufflebeem told reporters.
Rear Admiral Stufflebeem says US forces searched the caves for intelligence information, then directed air strikes against specific targets so the caves or buildings couldn't be used again.
The admiral says the area was found to be a significant centre of al-Qaida activity.
After more than a week of strikes, Sunday's bombing appeared to be the heaviest since last month's strikes on the cave complex at Tora Bora farther northeast.
"It's now time to go look elsewhere," Rear Admiral Stufflebeem said, referring to the search for additional al-Qaida members and their still elusive leader Osama bin Laden.
He added that precision-guided munitions from B-52 and B-1 bombers, as well as F-18 strike jets from aircraft carriers were used.
The admiral said he had not seen any reports of bodies found in the caves, but added: "I know we're not keeping a tally, if we had." Individuals had been seen in the area, but the admiral says he cannot say how recently.