WASHINGTON: The US continues to negotiate with Pakistan on re-opening of NATO supply routes to Afghanistan that were closed after a cross-border NATO air strike killed 24 Pakistani soldiers last year, the State Department said on Thursday.

"We are continuing to work on these issues with the government of Pakistan. As you know, that would follow on the visit that ambassador Grossman had to Pakistan," the State Department spokeswoman, Victoria Nuland, told reporters at her daily news conference.

We think it's important for us, it's important for a peaceful, stable situation in Afghanistan, and it's obviously that would be in Pakistan's interest as well," Nuland said responding to a question.