Panetta: Patience With Pakistan 'Reaching Limits' U.S. Defense Secretary Leon Panetta on Thursday pressured Pakistan to do more to root out the al-Qaida-linked Haqqani terrorist network, saying American officials are "reaching the limits of our patience." At a news conference in neighboring Afghanistan, Panetta repeatedly emphasized U.S. frustration with attackers crossing the border from Pakistan. It's essential that Pakistan stop "allowing terrorists to use their country as a safety net in order to conduct their attacks on our forces," he said alongside Afghan Defense Minister Abdul Rahim Wardak. "We have made that very clear time and time again and we will continue to do that, but as I said, we are reaching the limits of our patience," Panetta said. Panetta's explicit and repeated criticism of Pakistan's inaction, which he also voiced in his visit to India, appeared to signal a somewhat tougher stance and a suggestion that the U.S. is becoming even more willing and quick to strike terrorist targets inside Pakistan. The official spoke on condition of anonymity to discuss sensitive operations. Scott Olson/Getty Images The Haqqani group has been blamed for several attacks on Americans in Afghanistan, including last year' assault against the U.S. Embassy and NATO headquarters with rocket-propelled grenades. The group, which also has ties to the Taliban, has emerged as perhaps the biggest threat to stability in Afghanistan. U.S. lawmakers from both parties have been urging the State Department to designate the Haqqani network a foreign terrorist organization. The United States has given Pakistan billions of dollars in aid for its support in fighting Islamist militants. Despite pressure from the U.S., Pakistan has remained reluctant to go after insurgents, particularly the Haqqani network. "It is an increasing concern that the safe haven exists and that there are those - likely Haqqanis - who are making use of that to attack our forces," Panetta said in his second day of blunt criticism of Pakistan. For more than three decades the Haqqani network, led by the elderly Jalaluddin Haqqani, has maintained headquarters in Pakistan's Miran Shah district of North Waziristan. Pakistan has denied aiding the Haqqanis, and the Pakistani military has refused to carry out an offensive in the North Waziristan tribal region, saying it would unleash a tribal-wide war that Pakistan could not contain. Panetta said the U.S. continues to see Haqqani fighters moving from Pakistan into Afghanistan to attack American forces - most recently on June 1 when he said they detonated a truck bomb and then tried to storm Forward Operating Base Salerno in Khost province. Some U.S. service members were wounded in the attack, which was repelled by coalition forces. Fourteen heavily armed militants were killed. Panetta called it "an intolerable situation." The Afghan defense minister also said that Pakistan could do more, saying the Pakistanis are in a better position to provide intelligence or take law enforcement or military actions. "I do hope that gradually they will come to the conclusion to cooperate with us," Wardak said. If that cooperation starts, we will be able to disrupt their command and control, disrupt their training, disrupt their weapon recruitment and also will be able to eliminate or capture their leadership.