According to the sources, the meeting is being held with the approval of both the Taliban administration and the Pakistani government, and with the support of Turkiye.
Participants linked to the Taliban include Jafar Mahdavi, Atif Mashal, Ghuncha Gul Arman, Obaidullah Bahir and Sulaiman Bin Shah.
From Pakistan, participants include Mushahid Hussain, Sitara Ayaz, Asif Durrani, Senator Abdul Qadir Khan and Hamid Mir.
Sources said the agenda includes issues such as the activities of Tehreek-e-Taliban Pakistan and Islamic State in Afghanistan, border clashes, continued Pakistani air and ground strikes, economic conditions and the issue of migrants.
They added that the aim of the talks is to find ways to reduce tensions and explore practical mechanisms for managing border and security crises. Proposals discussed include intelligence sharing, measures to prevent clashes along the border, and facilitating movement for civilians and traders between the two countries.
The participants in Istanbul are holding talks with the tacit approval of the Taliban administration and the Pakistani government, within an informal but coordinated process mediated by Turkiye.
Several rounds of formal talks between the Taliban administration and the Pakistani government in Doha, Istanbul, Riyadh and Urumqi have failed to yield results. Pakistan continues its attacks on eastern Afghan provinces, causing civilian casualties and damage.
At the same time, Pakistan has expanded its ties with Taliban opponents, with some anti-Taliban groups reportedly seeking to open political offices in Pakistan.