Ayaz Mohammad Shah of Anantnag in Jammu and Kashmir was nabbed near Shastri Park metro station in northeast Delhi with 3.5 kilogrammes of explosives.
The faction owing allegiance to the Abdul Majid Dar has joined the Hizb-e-Islami, according to Daily Times.
"The international community should put effective pressure on Pakistan to implement its stated commitment to deal with terrorist groups within its territory, including members of Al-Qaeda, Taliban's Quetta Shura, Hizb-e-Islami, Lashkar-e-Tayiba and other like-minded terrorist groups," Foreign Secretary Nirupama Rao said in New Delhi.
The Pakistan army has admitted that it is in contact with Afghan Taliban leaders, including Mullah Mohammad Omar, and can bring them to the negotiating table with the US if its concerns with India are addressed.
In an embarrassment to the Delhi police, a court here on Thursday acquitted an alleged militant of Hizb-e-Islami as the probe agency failed to take mandatory sanction for his prosecution on charges of waging war against the country.
A large amount of RDX and arms were also seized.
Dreaded Islamic State of Iraq and Syria is trying to expand its influence in Pakistan, with pamphlets being distributed in Peshawar and border provinces of Afghanistan, seeking support for jihad.
"We appeal to the officials of past governments to return to their country as we will give them full protection of their lives. We are faced with the huge task of rebuilding and reconstruction of war-ravaged Afghanistan," he said.
The Taliban have confirmed that Pakistan's powerful intelligence chief Lieutenant General Faiz Hameed has met its de facto leader Mullah Abdul Ghani Baradar, amidst efforts by the insurgent group to finalise a government in Afghanistan.
Karzai has steadfastly opposed direct talks between the US and the Taliban, wanting Afghan ownership of the "reconciliation process", as the reintegration of the Taliban into the mainstream is referred to.