Afghan Deputy Foreign Minister Jawed Ludin told reporters that cooperation between neighboring countries was necessary to find a solution to the conflict.
"Without regional collaboration ... to really come together and address these problems jointly, we won't succeed," Ludin said, adding that the wars Afghanistan has experienced over the past few decades also affected other countries.
The parties will meet again in the Afghan capital, Kabul, in two weeks time.
Ludin said the aim of the Oslo and Kabul meetings was to agree on regional cooperation, including how to tackle terrorism, extremism and narcotics in the region, before a Nov. 2 conference in Istanbul, Turkey, where regional security and the transition in Afghanistan will be discussed.
In December, more than 1,000 delegates from 90 countries will gather in Bonn, Germany, to discuss the transfer of security operations to the Afghan government, international commitments to the country and the political process of national reconciliation.