Taliban soldiers stand in Pul-e-Charkhi prison in Kabul, Afghanistan, September 15, 2021. Pul-e-Charkh prison on the outskirts of Kabul was once teaming with prisoners including members of the Taliban and Islamic State. Now, one month after the Taliban swept to power in Afghanistan, it stands empty. WANA (West Asia News Agency) via REUTERS

A view of a cell in Pul-e-Charkhi prison in Kabul, Afghanistan, September 15, 2021. Once imprisoned in Afghanistan's largest prison, members of the Taliban have taken control of it. WANA (West Asia News Agency) via REUTERS

A Taliban soldier walks in Pul-e-Charkhi prison in Kabul, Afghanistan, September 15, 2021. Many prisoners from Pul-e-Charkh were released before the militant seized control. In 2020 the Afghan government released Taliban prisoners from a batch of 400 whom the militants wanted freed before they agreed to start peace negotiations. WANA (West Asia News Agency) via REUTERS

A view of a cell in Pul-e-Charkhi prison in Kabul, Afghanistan, September 15, 2021. WANA (West Asia News Agency) via REUTERS

A Taliban soldier stands in Pul-e-Charkhi prison in Kabul, Afghanistan, September 15, 2021. WANA (West Asia News Agency) via REUTERS

A general view of the Pul-e-Charkhi prison building in Kabul, Afghanistan, September 15, 2021. WANA (West Asia News Agency) via REUTERS