The United States and China made some progress in arms control and non-proliferation talks in Hawaii but remain at odds over alleged exports of missile technology by China.
The two sides met in Honolulu on Monday and Tuesday to press ahead with their dialogue on weapons issues following two days of talks in Beijing last month, said State Department spokesman Richard Boucher.
"Some additional progress has been made in these discussions, but I would say the missile issues remain unresolved," he said.
China made progress in enforcing controls on nuclear and chemical weapons technologies, he said.
Pakistan has strongly denied that China has been helping it develop missile technology.
China and the United States resumed talks on arms issues in early July, after they were broken off by China to protest the NATO bombing of its embassy in Belgrade in May 1999.
China used those talks to press home its strident opposition to US plans for an Asian theatre missile defence system and its own national missile shield.
US negotiators, including national security officials, were led in the Honolulu talks by Assistant Secretary for Non Proliferation Robert Einhorn.
(China Daily)