A senior diplomat from North Korea involved in stalled international talks to end its nuclear program has visited China, a South Korea news agency said on Wednesday, as China endorsed a fresh rebuke of the North by the United Nations.

The U.N. Security Council issued its latest condemnation of the North after it conducted ballistic missile test launches on Monday. China, the reclusive North Korea's main diplomatic ally, joined the criticism.

North Korean diplomat Choe Son Hui arrived in Beijing on Tuesday with her interpreter, the South's Yonhap news agency cited an anonymous source familiar with the situation in North Korea as saying.