“Acting on behalf of the United States government, we transferred custody of three Pakistanis held in US custody in Afghanistan, to Pakistan,” US Forces-Afghanistan said in a statement in Kabul.
“This followed consultations between the US and Pakistan and after receiving appropriate assurances”, it added.
The statement did not identify the detainees. But a Pakistani security official said one of them was Latif Mehsud, a close aide to the former chief of the Tehreek-e-Taliban Pakistan (TTP), Hakimullah Mehsud.
He was brought to Islamabad on Saturday along with two other Pakistani militants captured in Afghanistan — one from the northwestern Pakistani city of Swat and another from the South Waziristan tribal region near the Afghan border.
Hakimullah Mehsud was killed in a US drone strike in Pakistan in May last year.
The official did not disclose the names of the other two militants.
However, he said Mehsud was arrested by US forces in Afghanistan days before the death of Hakimullah Mehsud.
Another senior local official confirmed the incident and said Latif Mehsud also served as Hakimullah’s driver, which meant he was very close to the former TTP chief.
“Latif also served as Hakimullah’s deputy for quite some time”, he added.
Experts believe the move, which came after a recent visit by Afghan President Ashraf Ghani to Pakistan, seems part of efforts to build confidence and bilateral relations.
It shows the level of confidence between militaries of the two countries and (their) intelligence organisations is now far better,” Pakistani defence and security analyst Talat Masood told AFP.
He said the handover also showed improvement in quality of relations between Pakistan and the US.
Meanwhile, “Afghans have also realised it is in mutual interest not to support militants of either countries”, Masood added.
Pakistan has been demanding Kabul hand over fugitive TTP chief Maulana Fazlullah, who is reportedly hiding in Afghanistan’s Kunar province.
Both nations have long accused each other of allowing militants to shelter in the border regions and launch bloody attacks that threaten regional stability.
Former Afghan president Hamid Karzai routinely accused Pakistan of continuing to fuel the Taliban insurgency to destabilise his country as a hedge against Indian influence there.
Islamabad denies the charge but its support, and that of its powerful military, are seen as important for peace in Afghanistan as NATO pulls out its combat troops.
Ghani, who emerged as president after a long dispute over fraud-mired elections, has said that seeking peace is his first priority after decades of conflict in Afghanistan.