The United States has reached agreement with the Taliban on a week-long reduction of violence that could lead to a U.S. troops withdrawal from Afghanistan, a senior administration official said on Friday, while cautioning that the insurgents must honor commitments for the accord to stick.

The deal was struck in protracted negotiations in the Qatari capital Doha and was announced after a meeting between U.S. Secretary of State Mike Pompeo, Defense Secretary Mark Esper and Afghan President Ashraf Ghani on the sidelines of the Munich Security Conference.

The accord – if it holds – could pave the way for an agreement by the end of the month on a U.S. troops withdrawal from Afghanistan, a long-sought objective for U.S. President Donald Trump, who has vowed to stop the "endless wars" as he seeks re-election in November.

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"It was violence that derailed the signing of the agreement in September. Now we have an agreement on the reduction of violence. And, should the Talibs implement what they've committed to doing, we will move forward with the agreement," the senior administration official told reporters in Munich.

The seven-day period has not yet started, but will go into effect soon, the official said.

There were no immediate comments from Ghani's government or the Taliban.

There remains a long way to go for a peace settlement and to end the nearly two-decades-old U.S. military presence that began shortly after the 9/11 attacks by al Qaeda. U.S. officials have been clear that the 13,000 U.S. troops will be cut to about 8,600 this year, with or without a withdrawal deal.

The reduction in violence agreement "is a good step on a very long road," said Ronald Neumann, a former U.S. ambassador to Afghanistan.