Islamabad , Pakistan ( CNN ) -- A key member of an insurgent network in the Afghan-Pakistani region has been seized recent days , Pakistani military intelligence sources told CNN on Friday . He is Nasiruddin Haqqani , son of Afghan insurgent leader Jalaluddin Haqqani , whose notorious group , called the Haqqani Network , operates in Afghanistan and Pakistan and is closely tied to the Taliban . Nasiruddin Haqqani was detained in recent days while driving from Peshawar to the tribal region of North Waziristan , the sources said . The United Nations says he is believed to be based out of Miram Shah in North Waziristan , where the network operates . The Pakistani military intelligence sources asked not to be named because they are not authorized to speak to the media . This arrest comes amid concerns among U.S. officials that Pakistan has not been aggressively confronting militants operating in the tribal regions . The Haqqani Network `` has been at the forefront of insurgent activity in Afghanistan , responsible for many high-profile attacks , '' the United Nations says . Bill Roggio , managing editor of The Long War Journal , a website that tracks terror-related events and trends , calls the top leadership a `` family business . '' The United Nations says it consists of Jalaluddin Haqqani 's three oldest sons , one of whom is Nasiruddin , who operates as an emissary for the network and spends a lot of time fundraising , the United Nations says . He apparently speaks Arabic and is a close aide to his father , the United Nations says . His brother , Sirajuddin , is described by the U.S. Treasury Department as the overall leader of the network and the leader of the Miram Shah Regional Military Shura . The United Nations says the Haqqani Network is believed to have three main sources of funds : Gulf region donations , drug trafficking , and al Qaeda payments . `` In 2004 , ( Nasiruddin ) Haqqani traveled to Saudi Arabia with a Taliban associate to raise funds for the Taliban . He also provided funds in 2004 to militants in Afghanistan for the purpose of disrupting the Afghan presidential election . `` From at least 2005 to 2008 , Nasiruddin Haqqani collected funds for the Haqqani Network through various fundraising trips , including during regular travel to the United Arab Emirates in 2007 and through a fundraising trip to another Gulf state in 2008 , '' the United Nations said . And late last year , Nasiruddin Haqqani `` received several hundred thousand dollars from al Qaeda-associated individuals in the Arabian Peninsula '' for network activities . Earlier this year , the U.S. Department of the Treasury cited Nasiruddin Haqqani for supporting acts of terrorism . Sirajuddin Haqqani was designated a supporter of terrorism in 2008 . Many observers say the North Waziristan-based group has backing in the Pakistani military . `` Elements within the Pakistani security establishment continue to view the Haqqani Network as a useful ally and proxy force to represent their interests in Afghanistan . To this end , Haqqani forces have repeatedly targeted Indian infrastructure and construction projects in Afghanistan , '' the Institute for the Study of War said in a report this year . `` The Pakistani Army has consistently refused to launch a military operation in North Waziristan despite the presence of al Qaeda senior leadership , '' it said . A report published earlier this year by the New America Foundation think tank calls the Pakistani agency of North Waziristan `` the most important springboard for violence in Afghanistan today , much as it has been for decades . '' And it says the Haqqani Network is `` the most important militant group '' in North Waziristan 's Miram Shah , where Jalaluddin Haqqani settled in the mid-1970s after leaving his native Khost province in Afghanistan . `` Jalaluddin quickly became the most important mujahedeen commander in eastern Afghanistan during the 1980s '' when Afghan fighters took on the Soviet Union , the report says . North Waziristan has been a `` safe haven '' for militants eluding U.S. and Pakistani military actions , it notes . `` Shortly after the fall of the Taliban regime in Afghanistan in late 2001 , thousands of Taliban members associated with the regime flooded into North Waziristan , '' according to the report , titled `` The Battle for Pakistan : North Waziristan . '' `` Many took shelter in ( North Waziristan 's ) treacherous and heavily forested Shawal Valley , which became a refuge for all sorts of foreign militants , including those from al Qaeda . Pakistani government forces subsequently targeted other Pakistani safe havens , including South Waziristan . In 2004 , a wave of militants arrived in North Waziristan after being pushed out of South Waziristan 's Shakai Valley . More recently , a variety of militants associated with the Mehsud tribe in South Waziristan is believed to have sought safe haven in North Waziristan . '' Will the arrest make an impact in the war against the Taliban ? Roggio doubts it . He says the Haqqanis are one of the Pakistani state 's premier proxies and puts them on par with Lashkar-e-Tayyiba , the Pakistan-based group that was blamed for a violent siege on Mumbai in November 2008 . He notes that there has been pressure to appease and deflect pressure from the United States and NATO . `` When the heat gets turned up , '' he said , Pakistan will make a gesture but `` not a real sacrifice . '' CNN 's Aliza Kassim , Joe Sterling and Tim Lister contributed to this report .
Nasiruddin Haqqani was seized in recent days . He was arrested while driving to the tribal region from Peshawar . The Pakistani Taliban claimed responsibility for his death, saying he had been killed by a drone strike on Sunday.