An ISIS flag painted on a book stand is seen in a cell in Pul-e-Charkhi prison in Kabul, Afghanistan, September 15, 2021. WANA (West Asia News Agency) via REUTERS ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY.

Pul-e-Charkhi prison police helmets and shields are seen in the prison building in Kabul, Afghanistan, September 15, 2021. WANA (West Asia News Agency) via REUTERS ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY.

Cases of documents are seen in Pul-e-Charkhi prison in Kabul, Afghanistan, September 15, 2021. WANA (West Asia News Agency) via REUTERS ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY.

A general view of the Pul-e-Charkhi prison building in Kabul, Afghanistan, September 15, 2021. WANA (West Asia News Agency) via REUTERS ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY.

A view of a cell in Pul-e-Charkhi prison in Kabul, Afghanistan, September 15, 2021. WANA (West Asia News Agency) via REUTERS ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY.

Graffiti is seen in a cell in Pul-e-Charkhi prison in Kabul, Afghanistan September 15, 2021. WANA (West Asia News Agency) via REUTERS ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY.

A view of a cell in Pul-e-Charkhi prison in Kabul, Afghanistan, September 15, 2021. WANA (West Asia News Agency) via REUTERS ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY.

A view of a cell in Pul-e-Charkhi prison in Kabul, Afghanistan, September 15, 2021. WANA (West Asia News Agency) via REUTERS ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY.

Graffiti is seen in a cell in Pul-e-Charkhi prison in Kabul, Afghanistan September 15, 2021. WANA (West Asia News Agency) via REUTERS ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY.

A view of a corridor in Pul-e-Charkhi prison in Kabul, Afghanistan, September 15, 2021. WANA (West Asia News Agency) via REUTERS ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY.

Decorations are seen in a cell in Pul-e-Charkhi prison in Kabul, Afghanistan September 15, 2021. WANA (West Asia News Agency) via REUTERS ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY.

An Afghan flag is seen in Pul-e-Charkhi prison in Kabul, Afghanistan, September 15, 2021. WANA (West Asia News Agency) via REUTERS ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY.

Graffiti is seen in a cell in Pul-e-Charkhi prison in Kabul, Afghanistan September 15, 2021. WANA (West Asia News Agency) via REUTERS ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY.

Handcuffs are seen in a cell in Pul-e-Charkhi prison in Kabul, Afghanistan, September 15, 2021. WANA (West Asia News Agency) via REUTERS ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY.

A Taliban soldier walks in Pul-e-Charkhi prison in Kabul, Afghanistan, September 15, 2021. WANA (West Asia News Agency) via REUTERS ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY.

Taliban soldiers walk in Pul-e-Charkhi prison in Kabul, Afghanistan, September 15, 2021. WANA (West Asia News Agency) via REUTERS ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY.

Taliban soldiers stand in Pul-e-Charkhi prison in Kabul, Afghanistan, September 15, 2021. WANA (West Asia News Agency) via REUTERS ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY.

A Taliban soldier stands in Pul-e-Charkhi prison in Kabul, Afghanistan, September 15, 2021. WANA (West Asia News Agency) via REUTERS ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY.

A Taliban soldier stands in Pul-e-Charkhi prison in Kabul, Afghanistan, September 15, 2021. WANA (West Asia News Agency) via REUTERS ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY.

Graffiti is seen in a cell in Pul-e-Charkhi prison in Kabul, Afghanistan September 15, 2021. WANA (West Asia News Agency) via REUTERS ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY.

A view of a cell in Pul-e-Charkhi prison in Kabul, Afghanistan, September 15, 2021. WANA (West Asia News Agency) via REUTERS ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY.

Markings are seen in a cell in the Pul-e-Charkhi prison in Kabul, Afghanistan September 15, 2021. WANA (West Asia News Agency) via REUTERS ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY.

People walk next to the Pul-e-Charkhi prison wall in Kabul, Afghanistan, September 15, 2021. WANA (West Asia News Agency) via REUTERS ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY.

A person walks in a cell in Pul-e-Charkhi prison in Kabul, Afghanistan September 15, 2021. WANA (West Asia News Agency) via REUTERS ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY.

A person walks in a corridor in the Pul-e-Charkhi prison in Kabul, Afghanistan, September 15, 2021. WANA (West Asia News Agency) via REUTERS ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY.

A Taliban soldier stands in Pul-e-Charkhi prison in Kabul, Afghanistan, September 15, 2021. WANA (West Asia News Agency) via REUTERS ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY.

UPDATE New details The Taliban are a hardline Islamist movement in Afghanistan that has been fighting an insurgency against the Western-backed government in Kabul since being ousted from power in 2001.

Taliban forces try to stop the protesters, as they shout slogans during an anti-Pakistan protest, near the Pakistan embassy in Kabul, Afghanistan, September 7, 2021. REUTERS/Stringer

Afghan demonstrators shout slogans during an anti-Pakistan protest, near the Pakistan embassy in Kabul, Afghanistan, September 7, 2021. REUTERS/Stringer

A member of the Taliban forces points his gun at protesters, as Afghan demonstrators shout slogans during an anti-Pakistan protest, near the Pakistan embassy in Kabul, Afghanistan September 7, 2021. REUTERS/Stringer TPX IMAGES OF THE DAY

Afghan demonstrators shout slogans during an anti-Pakistan protest, near the Pakistan embassy in Kabul, Afghanistan, September 7, 2021. REUTERS/Stringer TPX IMAGES OF THE DAY

Afghan demonstrators shout slogans during an anti-Pakistan protest, near the Pakistan embassy in Kabul, Afghanistan, September 7, 2021. REUTERS/Stringer

Taliban forces walk in front of Afghan demonstrators as they shout slogans during an anti-Pakistan protest, near the Pakistan embassy in Kabul, Afghanistan, September 7, 2021. REUTERS/Stringer

Taliban spokesman Zabihullah Mujahid speaks during a news conference in Kabul, Afghanistan September 6, 2021. REUTERS/Stringer

Taliban spokesman Zabihullah Mujahid speaks during a news conference in Kabul, Afghanistan September 6, 2021. REUTERS/Stringer

Taliban spokesman Zabihullah Mujahid speaks during a news conference in Kabul, Afghanistan September 6, 2021. REUTERS/Stringer

Taliban spokesman Zabihullah Mujahid speaks during a news conference in Kabul, Afghanistan September 6, 2021. REUTERS/Stringer

Passengers disembark from a commercial plane on arrival from Kandahar at Hamid Karzai International Airport in Kabul, Afghanistan September 5, 2021. REUTERS/Stringer

A member of Taliban forces stands guard at Hamid Karzai International Airport in Kabul, Afghanistan September 5, 2021. REUTERS/Stringer

Passengers disembark from a commercial plane on arrival from Kandahar at Hamid Karzai International Airport in Kabul, Afghanistan September 5, 2021. REUTERS/Stringer

A member of Taliban forces stands guard next to a plane that has arrived from Kandahar at Hamid Karzai International Airport in Kabul, Afghanistan September 5, 2021. REUTERS/Stringer

An Afghan man takes a picture of a commercial plane that has arrived from Kandahar at Hamid Karzai International Airport in Kabul, Afghanistan September 5, 2021. REUTERS/Stringer

An Afghan family walk along a street in Kabul, Afghanistan September 4, 2021. REUTERS/Stringer

An Afghan burqa-clad woman holds her child as she walks along a street in Kabul, Afghanistan September 4, 2021. REUTERS/Stringer

Members of Taliban security forces stand guard among crowds of people walking past in a street in Kabul, Afghanistan September 4, 2021. REUTERS/Stringer

A member of Taliban security forces stands guard among crowds of people walking past in a street in Kabul, Afghanistan September 4, 2021. REUTERS/Stringer

A person holds a bundle of Afghan afghani banknotes at a money exchange market, following banks and markets reopening after the Taliban took over in Kabul, Afghanistan, September 4, 2021. REUTERS/Stringer

Afghan money exchange dealers wait for customers at a money exchange market, following banks and markets reopening after the Taliban took over in Kabul, Afghanistan, September 4, 2021. REUTERS/Stringer

Members of Taliban security forces stand guard as crowds of people walk past in front of a money exchange market in Kabul, Afghanistan September 4, 2021. REUTERS/Stringer TPX IMAGES OF THE DAY

An Afghan money exchange dealer carries bundles of banknotes at an exchange market, following banks and markets reopening after the Taliban took over in Kabul, Afghanistan, September 4, 2021. REUTERS/Stringer

An Afghan money exchange dealer waits for customers at a money exchange market, following banks and markets reopening after the Taliban took over in Kabul, Afghanistan, September 4, 2021. REUTERS/Stringer TPX IMAGES OF THE DAY

Afghan women's rights defenders and civil activists protest to call on the Taliban for the preservation of their achievements and education, in front of the presidential palace in Kabul, Afghanistan September 3, 2021. REUTERS/Stringer

Afghan women's rights defenders and civil activists protest to call on the Taliban for the preservation of their achievements and education, in front of the presidential palace in Kabul, Afghanistan September 3, 2021. REUTERS/Stringer

Afghan women's rights defenders and civil activists protest to call on the Taliban for the preservation of their achievements and education, in front of the presidential palace in Kabul, Afghanistan September 3, 2021. REUTERS/Stringer

Afghan women's rights defenders and civil activists protest to call on the Taliban for the preservation of their achievements and education, in front of the presidential palace in Kabul, Afghanistan September 3, 2021. REUTERS/Stringer

Afghan women's rights defenders and civil activists protest to call on the Taliban for the preservation of their achievements and education, in front of the presidential palace in Kabul, Afghanistan September 3, 2021. REUTERS/Stringer

Afghan women's rights defenders and civil activists protest to call on the Taliban for the preservation of their achievements and education, in front of the presidential palace in Kabul, Afghanistan September 3, 2021. REUTERS/Stringer

Afghan women's rights defenders and civil activists protest to call on the Taliban for the preservation of their achievements and education, in front of the presidential palace in Kabul, Afghanistan September 3, 2021. REUTERS/Stringer TPX IMAGES OF THE DAY

Afghan women's rights defenders and civil activists protest to call on the Taliban for the preservation of their achievements and education, in front of the presidential palace in Kabul, Afghanistan September 3, 2021. REUTERS/Stringer

Pakistani soldiers stand guard in front of a member of the Taliban force, in the background, during an organised media tour to the Pakistan-Afghanistan crossing border, in Torkham, Pakistan September 2, 2021. REUTERS/Gibran Peshimam