Kabul , Afghanistan ( CNN ) -- NATO and U.S. forces are seeing a marked increase in infiltration into Afghanistan from Pakistan by the militant Haqqani network , a senior NATO official said Tuesday . There has been a significant increase in the Haqqani network 's activity in Khost , Paktia , Logar and Wardak provinces which are used in that order as an infiltration route from Pakistan , to launch attacks on the capital , the official said . The senior NATO official spoke to reporters in Kabul on the condition no name was used . Whether or not NATO and the United States will have to provide more assistance to the Afghan security forces , particularly along the border with Pakistan , will depend on `` the level of threat coming out of Miramshah '' in North Waziristan , the official said . Miramshah is believed to be where the Haqqani network leaders are based . Haqqani fighters are blamed for killing more than 1,000 coalition and Afghan forces . The official said Haqqani militants were behind a series of `` spectacular attacks , '' this summer , including a 20-hour attack on the American Embassy , last month , and an assault on Kabul 's InterContinental Hotel , in June , which left at least a dozen people dead . NATO officials said there had also been a marked increase in the number of cross border attacks from Pakistan , but the insisted reports of artillery bombardments and heavy casualties were often exaggerated . International Security Assistance Force troops respond to all reports by deploying surveillance assets , usually helicopters and drones , but they often can not find evidence of structural damage or the craters consistent with the villagers ' accounts of sustained artillery and rocket bombardments , the official explained . The official said ISAF 's primary objective is sharing this information with Afghan and Pakistani officials as quickly as possible to diffuse cross-border tensions . Both sides have agreed , within the last ten days , to set up a working group for investigating future allegations . Part of the problem is that insurgents have reoccupied safe havens inside Afghanistan , which became much more attractive following the U.S. withdrawal from remote bases in Kunar and Nuristan provinces , coupled with increased pressure on the Pakistani side of the border , said the official . While most of the cross-border attacks are launched by insurgents , he said there is legitimate confusion as to where the border lies . `` We 'll get the maps out and there will be differences of multiples of kilometers of where they think the border is , '' the official said . Gen. John Allen , the commander of U.S. and NATO forces in Afghanistan , has completed a compressed 90-day assessment and revision of the campaign plan and , contrary to earlier suggestions that there would be an abrupt shift of focus to the east of the country , he concluded that he wants to continue building on progress in the south , while keeping Kabul and its environs secure , eventually linking the two areas via Afghanistan 's ring road , the official told reporters . `` As things improve in the south we will focus more on the east , '' the official said . `` Our progress is incremental , but it is progress , '' the official said . `` We have physically taken away their safe havens [ in the south ] , and they wo n't get them back . '' In the east , the focus will be on Kabul and the surrounding provinces , particularly Wardak and Logar , which are being used to launch attacks on the capital , the official said . `` The other issue is the harder one , that 's the sense of security in the minds of the Afghan people ... . Do the Afghan people feel any more secure ? No , not yet . '' The military is proving the space for the Afghan government , but the government remains deeply unpopular and corrupt , the official said . Areas likely to be slated for transition in the upcoming second tranche include the Ghazni municipality ( capital of Ghazni province Maidan Shah ( the capital of Wardak ) , and Nawa , in Helmand . Kunar is likely to be at least a year away .
Official : Taliban network has increased penetration into Afghanistan from Pakistan . Taliban fighters are blamed for killing more than 100 coalition and Afghan forces . Allied commander wants to put pressure on the Taliban .