NEW YORK - US officials Friday gave a new twist to the raging controversy over the deadly NATO raid on Mohmand agency border posts, claiming that they consulted with Pakistani officials who gave the go-ahead for the NATO attack, The Wall Street Journal reported.. The officials at Pakistan's border coordination centre were unaware that their troops were in the area on Saturday near the Afghan border, the newspaper reported, citing unnamed US officials familiar with initial investigations into the helicopter strike. An Afghan-US troop contingent searching for militants near the border came under fire from what they believed to be militants but the gunfire was actually from Pakistani troops camped nearby, the officials told the Journal. Permission for an airstrike was sought from a border coordination centre manned by Pakistani, Afghan and US officials, one official was quoted as saying. The Pakistani officials did not know Pakistani soldiers were in the area and gave the green light to the NATO attack in the Mohmand Agency, one of Pakistan's seven tribal districts, the official told the Journal, citing information gathered from preliminary investigations. The attack prompted Pakistan to boycott an international conference next week on the future of Afghanistan, where its presence was seen as crucial to securing a peaceful future for it neighbour, given their geographical proximity and the need for Pakistan's military in the war against Taliban militants. It also worsened US-Pakistani relations already strained by a US commando raid inside Pakistan that killed Osama bin Laden. US officials told the Journal that both sides made mistakes ahead of the attack. The Afghan-US force involved had not informed the coordination centre, which was established to share information and prevent conflicts, that it was carrying out an operation in the area. US officials have been reluctant in the past to share such information with Pakistan because of worry that it would leak out, the Journal reported. "There were lots of mistakes made," one official was quoted as saying. "There was not good situational awareness to who was where and who was doing what." Pakistan closed its border crossings that the United States and NATO use to supply their soldiers in Afghanistan in the wake of the attack, which provoked protests in Pakistan against the United States and NATO. NATO Secretary General Anders Fogh Rasmussen called the attack a "tragic, unintended incident," and the United States expressed condolences while ordering the investigation.