The United States targeted key leaders of Afghanistan's Taliban with new sanctions, a move that could complicate Afghan efforts to reconcile with insurgents. The action by the Treasury Department on Thursday will freeze the insurgents' assets, ban travel and trigger an arms embargo, and it comes just a week after a top military commander urged the sanctions. Three financial kingpins were targeted, including a key member of the Haqqani network, which directs operations against US and coalition forces in Afghanistan from safe havens in Pakistan. US officials have been pressing Pakistan to crack down on the Al-Qaida-linked Haqqani network, saying that Islamabad's reluctance to move into group's base in North Waziristan is hampering the Afghan war effort. But Afghanistan's government has also held talks recently with some insurgent factions. Among those targeted with sanctions Thursday was Nasiruddin Haqqani, an emissary for the Haqqani Network and brother of Sirajuddin Haqqani who leads the group with his father, Jalaluddin. Others sanctioned included Gul Agha Ishakzai, the head of the Taliban's financial commission and Amir Abdullah, the former treasurer to captured Taliban leader Mullah Abdul Ghani Barader. The designation of the three leaders as terrorists would deprive them of the assets they need to fund their terror operations, said Adam J. Szubin, director of Treasury's Office of Foreign Assets Control. “We will continue to aggressively work to expose and dismantle the financial networks of terrorist groups in support of the president's goal of a stable Afghanistan,” he said. According to officials, Ishakzai is the head of the Taliban's financial commission, has collected money for suicide attacks in Kandahar, Afghanistan, and has been involved in the disbursement of funds for Taliban fighters. He has served as a main financial officer and close adviser to Taliban leader Mullah Mohammad Omar. Nasiruddin Haqqani has collected funds for the Haqqani group, including from Al-Qaida. Last week, Gen. David Petraeus, the top military commander in Afghanistan, urged officials to add commanders from the Haqqani network to the terrorist list.