North Korea, China and Russia have urged the U.N. Security Council to review sanctions against Pyongyang, arguing the country has already started taking practical measures toward denuclearization, its state-run media reported Thursday.

The three nations have also confirmed their opposition to sanctions individual countries have imposed on North Korea aimed at preventing it from developing nuclear weapons and ballistic missiles, the Korean Central News Agency reported.

The stances were expressed Tuesday at talks in Moscow between North Korean Vice Foreign Minister Choe Son Hui, Chinese Vice Foreign Minister Kong Xuanyou and Russian Vice Foreign Minister Igor Morgulov.

Choe, who handles nuclear weapons issues and negotiations with the United States, and Kong, who doubles as China's special representative for Korean Peninsula affairs, arrived in Beijing by air on Thursday.

North Korea and the United States have agreed to hold working-level talks soon to arrange a second summit meeting between leader Kim Jong Un and President Donald Trump that could take place by the end of this year.

Choe is expected to serve as a representative of North Korea's side of the envisioned working-level meeting. She did not answer reporters' questions as she arrived at Beijing Capital International Airport.

Trump said earlier this week that he wants to meet with Kim after the U.S. midterm elections on Nov. 6 and that he is considering three or four possible locations for their second summit following the first one on June 12 in Singapore.

Choe returned to Pyongyang by air from Beijing later Thursday, Kyodo News confirmed.