Earlier, Afghan Taliban spokesperson Suhail Shaheen said on Twitter that the delegation had been given a formal invitation for the visit and that they would discuss important issues with Pakistani officials in Islamabad.
Earlier in September, the US and Taliban were close to a deal when President Donald Trump suddenly called off a meeting with representatives of the insurgent group and Afghan President Ashraf Ghani at Camp David.
Trump ended the negotiating process that Khalilzad had been running for a year over a Taliban attack in Kabul that left 12 people, including a US soldier, dead.
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