The chief U.S. negotiator on North Korea arrived in Beijing Saturday to try to revive stalled nuclear disarmament talks.

Assistant Secretary of State Christopher Hill was in Bangkok Friday.  He told reporters that he might hold talks in Beijing with his North Korean counterpart, Kim Kye Kwan.

A U.S. State Department spokesman said Hill will meet with Chinese officials over the next two days before traveling on for previously scheduled meetings in Hanoi.  The spokesman did not confirm any planned meetings between Hill and North Korea's Kim.

Hill had what he called "good discussions" with Chinese officials this week on the stalemated talks.

Pyongyang was supposed to provide a list of all of its nuclear programs by the end of last year, under a deal reached with the U.S., China, Japan, Russia and South Korea.  But Washington says the list was not complete.

The United States is demanding that North account for uranium enrichment that Pyongyang has never publicly acknowledged. 

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