(CNN) Defense Secretary Mark Esper on Saturday said the US has not yet fully set a date for when it will begin a period of reduction in violence negotiated with the Taliban.

"That is a moving date because we are still doing consultations if you will ... yesterday Secretary (of State Mike) Pompeo and I met with (Afghan) President (Ashraf) Ghani ... so I can't give you a hard date right now," Esper told reporters in Munich, Germany, before leaving to return to the US.

Esper said the US will need to make some decisions after the agreement on the violence, which is expected to last about seven days, ends.

"There is a reduction in violence period, and then we have to consider whether or not to move forward with the agreement, with the peace agreement. There will be a reduction (of US service members stationed in Afghanistan) to a certain number over time 8,600 and from there -- actually from the beginning it's all conditions based," he said.

Esper first announced the negotiated proposal to decrease violence earlier this month, stating, "We've said all along that the best if not only solution in Afghanistan is a political agreement. Progress has been made on this front, and will have more to report on that soon, I hope."

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