Updated

A top U.S. national security official says President Barack Obama and Chinese President Xi Jinping found "quite a bit of alignment" on the subject of North Korea and agreed that North Korea has to be denuclearized.

White House national security adviser Tom Donilon says that the leaders also agreed that neither country will accept North Korea as a nuclear-armed state.

Donilon says the common ground between Obama and Xi on North Korea provides a key for enhanced U.S.-China cooperation.

He spoke Saturday at the end of two days of meeting between Obama and Xi in an estate in the California desert.