US special representative for Afghanistan and Pakistan, Marc Grossman has said that some differences exist with Pakistan over reopening of supply routes and time would be required to resolve those issues.

Talking to media persons at Chicago, he said that President Zardari did meet with President Karzai and with US Secretary of State Hillary Clinton in Chicago and discussed Pakistan’s role in regional peace and the end stages of Nato involvement in Afghanistan.

He said that time would be required for issues to be resolved with Pakistan.

The meeting between Mr. Zardari and Clinton lasted for over an hour. Others present included Pakistani Foreign Minister Hina Rabbani Khar, Pakistan’s ambassador to the US, Sherry Rehman and the U.S. ambassador to Pakistan, Cameron Munter.

Grossman said that the meeting included “a complete review of all of our bilateral partnerships.” He added that the purpose was to focus on “how to move forward in this relationship.”

The senior US envoy said the talks will help with the ongoing negotiations over the NATO supply routes, and he played down the significance of the Obama-Karzai-Zardari meeting that did not take place, saying it would be "better" for Afghanistan and Pakistan to hold direct bilateral talks.