Nearly three months after President Biden's administration withdrew personnel from Afghanistan, the Pentagon announced Wednesday that "dozens" of family members of American troops remain in the country.

When asked about the "number of immediate family members of US service troops in Afghanistan" during a press briefing, Pentagon spokesman John Kirby said he didn't "have a whole number on that."

"We believe it's certainly most likely in the dozens, but one of the reasons we put the memo out last week was to encourage service members to come forward," Kirby said. He was referring to a defense memo sent out last week that called on service members and civilians to provide information about immediate family members who remain in Afghanistan.

"We're working this as hard as we can," Kirby said, adding that the Pentagon takes "the obligation seriously to our people and to their families."

"That's why we put the advisory out to the services last week, to give them a place, a portal where they can go to put information on there that we can then share with our State Department colleagues to get them out," he added. "We're going to stay at this."

Kirby said the memo was sent out to the services earlier this week to inform personnel that "immediate family members in Afghanistan are eligible for facilitated departure."

Kirby also stated on Wednesday that the mission to remove Americans from Afghanistan "is not over," and that defense officials will "continue to work inside the interagency to achieve so."

"Of course there is," Kirby responded when asked if there was concern for the well-being of family members of troops still in Afghanistan.