UN Secretary-General Antonio Guterres speaks during a session.

The five permanent Security Council members are united on seeking a stable Afghanistan, UN Secretary-General Antonio Guterres said Wednesday after talks among foreign ministers following the Taliban takeover.

China and Russia have described last month's Taliban victory as a defeat for the United States and moved to work with the insurgents, but no country has moved to recognise a government that includes international pariahs.

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The Security Council powers all want "a peaceful and stable Afghanistan where humanitarian aid can be distributed without problems and without discrimination," Secretary-General Antonio Guterres told reporters after the meeting during the annual General Assembly.

They seek "an Afghanistan where the rights of women and girl are respected, an Afghanistan that is not a sanctuary for terrorism, an Afghanistan with an inclusive government representing all sections of the population," he said.

Mullah Abdul Ghani Baradar (right) and Zalmay Khalilzad shake hands after signing an agreement in Doha. File/Reuters

Afghanistan was also the subject of virtual talks by the Group of 20 major economies that included the participation of several other nations including Qatar, the hub for Taliban diplomacy.

German Foreign Minister Heiko Maas, addressing the G20, renewed concern about the Islamists' caretaker government which includes no non-Taliban and no women but has ministers blacklisted by the United Nations on terrorism allegations.

"The announcement of a non-inclusive government was a tactical mistake by the Taliban, as it will make it harder for us to engage with them," Maas said.

"It is important that they hear this from all of us. And we should also speak with one voice when it comes to the basic political parameters and benchmarks for any future engagement with them."

The Taliban have requested to speak at the UN General Assembly but the United States, which sits on the credentialing committee, has made clear that no decision will be made before the summit ends early next week.