President Biden is planning to withdraw the U.S. ambassador and all diplomatic staff in Afghanistan by Tuesday, and it is unclear when — or if — they might return to the country, according to two U.S. officials.

Despite the Taliban’s expressed interest in having the United States maintain a diplomatic mission in Kabul, the Biden administration has not made a final decision about what a future presence might look like. On Friday, State Department spokesman Ned Price said the Biden administration is “actively discussing” the Taliban’s request with U.S. allies and partners in the region — but the United States has not yet engaged directly with the Taliban to discuss what form a diplomatic mission might take, according to one U.S. official who, like others, spoke on the condition of anonymity to discuss sensitive policy deliberations.

The lack of a set plan all but ensures that the United States’ diplomatic presence in Kabul will lapse for weeks, months or even longer — potentially complicating the Biden administration’s ability to make good on recent assurances that although the U.S. military is departing the country by Tuesday, the United States will continue to help Americans and Afghans who want to leave after they are gone.