The U.S. nuclear envoy and his North Korean counterpart have held a second day of talks in China on Pyongyang's secretive nuclear program.

Christopher Hill (file photo)

Christopher Hill said Wednesday's meeting in Beijing was productive but gave few other details. Earlier, he said he expected the talks to focus on reaching a timetable for Pyongyang to completely declare its nuclear activities.

A State Department spokesman said Hill had both a meeting and lunch with North Korea's Kim Kye Kwan. He said the talks focused on the final steps in the disablement phase and some planning for how to continue the process after that. He said the discussions were "substantive" but did not offer a timeline for further steps.

The spokesman said Hill also met with Chinese officials in the afternoon and finished the day by having dinner with Japan's nuclear envoy Akitata Saiki.

Hill will travel to Russia later in the week to meet with Russian officials on the same topic.

North Korea has agreed to disable and dismantle its main nuclear complex under a deal reached last year with the United States, China, Japan, Russia and South Korea. In return, North Korea was promised diplomatic incentives and energy aid.

Last week, Hill said he expects the negotiations to speed up in the coming weeks.

Earlier this month, North Korea handed over 18,000 pages of records for its Yongbyon reactor and reprocessing plant. The United States is analyzing the documents and says they appear to be accurate.

Some information for this report was provided by AP and Reuters.