U.S. Secretary of State Hillary Clinton also said Islamabad will not charge any transit fees when the routes re-open.
I offered our sincere condolences to the families of the Pakistani soldiers who lost their lives, Clinton said.
Foreign Minister [Hina Rabbani] Khar and I acknowledged the mistakes that resulted in the loss of Pakistani military lives. We are sorry for the losses suffered by the Pakistani military. We are committed to working closely with Pakistan and Afghanistan to prevent this from ever happening again.
The Pakistani government has yet to comment on the development.