ISLAMABAD - US Ambassador Cameron Munter on Monday returned to Pakistan with a set of fresh guidelines on US-Pakistan relations from his seniors in the State Department where he remained hectically engaged for almost three weeks.Well-placed diplomatic sources informed TheNation that Ambassador Munter after arrival remained busy in meetings with his embassy colleagues and briefed them about his lengthy trip.Sources said that Munter shared with his colleagues the state of frustration prevailing in the US over the delay in Pakistan’s parliamentary review of bilateral relations that remain in tatters since Nato’s November 26 attacks on Salalah security posts. Sources said that Ambassador Munter would soon start meeting Pakistani leaders and officials in renewed US efforts seeking unconditional resumption of Nato supplies to Afghanistan. “We respect Pakistan’s sovereign right for parliamentary review process. We are patiently waiting as the US is committed for resumption of full spectrum relations with Pakistan”, Embassy spokesman Mark Stroh told TheNation.He said the US and Pakistan in the meanwhile were keeping their diplomatic channels open.The Obama administration has been confused and frustrated after Pakistan’s refusal to receive senior American officials for normalising relations with Pakistan.Pakistan had refused to receive Special Representative for Afghanistan and Pakistan Marc Grossman, Deputy Secretary of State Thomas Nides and the administrator of the US Agency for International Development, Rajiv Shah on the plea that it was useless till completion of parliamentary review process.This news was published in The Nation newspaper. Read complete newspaper of 06-Mar-2012 here.