Negotiations over resumption of the Nato supply route are underway with Pakistani officials State Department's Spokesperson Victoria Nuland said during a briefing Thursday.
She also added that US have seen cross-border militancy for more than a decade.
"It is important to have action against terror on the Pakistan side, on the Afghan side, and for Afghanistan, Pakistan and ISAF to continue to work together." He added.
Meanwhile, Afghan political expert, Mohammad Taher Hashimi believes that US will not try to make its relations with Pakistan more tense.
"US will not want to worsen its relations with Pakistan; having such kind of negotiation could change Pakistan to an effective country to combat insurgency in the region." Mr Hashimi added.
Regarding the 2014 transition plan, Nuland said that US is expecting ISAF forces will begin to flow home as Afghan forces take on lead responsibility for security.
Nato supply route was blocked by Pakistan government last November after a deadly Nato strike killed as many as 24 soldiers near the border with Afghanistan.