The U.S. has called for other permanent members of the United Nations Security Council to adhere to the Nuclear Non-Proliferation Treaty.

The call Thursday by Undersecretary of State for Arms Control and International Security Affairs Andrea Thompson in Beijing comes as the U.S. is preparing to withdraw from a separate pact, the 1987 Intermediate-Range Nuclear Forces Treaty between the United States and the former Soviet Union.

Thompson says some countries are violating non-proliferation and developing new weapons programs, a likely reference to Russia, Iran and possibly North Korea. The NPT aims to stop the spread of nuclear weapons.

The 1987 treaty bans production, testing and deployment of land-based cruise and ballistic missiles with a range of 500-5,500 kilometers (310-3,400 miles).

NATO secretary-general has urged Russia to respect the 1987 treaty.

The Director-General for Consular and Security of the British Foreign Office Philip Barton attends a panel discussion after a Treaty on the Non-Proliferation of Nuclear Weapons (NPT) conference in Beijing, China, Thursday, Jan. (NPT) conference in Beijing consists of five permanent members (P5) China, France, Russia, the United Kingdom, and the United States. (Thomas Peter/Pool Photo via AP)
The Director-General for Consular and Security of the British Foreign Office Philip Barton attends a panel discussion after a Treaty on the Non-Proliferation of Nuclear Weapons (NPT) conference in Beijing, China, Thursday, Jan. (NPT) conference in Beijing consists of five permanent members (P5) China, France, Russia, the United Kingdom, and the United States. (Thomas Peter/Pool Photo via AP)
Delegation members from the UN Security Council's five permanent members (P5) from left; Philip Barton of the United Kingdom, Andrea Thompson of the U. (NPT) conference in Beijing, China, Thursday, Jan. 31, 2019. The Treaty on the Non-Proliferation of Nuclear Weapons (NPT) conference in Beijing consists of five permanent members (P5) China, France, Russia, the United Kingdom, and the United States. (Thomas Peter/Pool Photo via AP)
Delegation members from the UN Security Council’s five permanent members (P5) from left; Philip Barton of the United Kingdom, Andrea Thompson of the U. (NPT) conference in Beijing, China, Thursday, Jan. 31, 2019. The Treaty on the Non-Proliferation of Nuclear Weapons (NPT) conference in Beijing consists of five permanent members (P5) China, France, Russia, the United Kingdom, and the United States. (Thomas Peter/Pool Photo via AP)
U.S. Under Secretary of State Andrea Thompson attends a panel discussion after a Treaty on the Non-Proliferation of Nuclear Weapons (NPT) conference in Beijing, China, Thursday, Jan. (NPT) conference in Beijing consists of five permanent members (P5) China, France, Russia, the United Kingdom, and the United States. (Thomas Peter/Pool Photo via AP)
U.S. Under Secretary of State Andrea Thompson attends a panel discussion after a Treaty on the Non-Proliferation of Nuclear Weapons (NPT) conference in Beijing, China, Thursday, Jan. (NPT) conference in Beijing consists of five permanent members (P5) China, France, Russia, the United Kingdom, and the United States. (Thomas Peter/Pool Photo via AP)
The Director for Strategic Affairs, Security and Disarmament of the French Foreign Ministry Nicolas Roche attends a panel discussion after a Treaty on the Non-Proliferation of Nuclear Weapons (NPT) conference in Beijing, China, Thursday, Jan. (NPT) conference in Beijing consists of five permanent members (P5) China, France, Russia, the United Kingdom, and the United States. (Thomas Peter/Pool Photo via AP)
The Director for Strategic Affairs, Security and Disarmament of the French Foreign Ministry Nicolas Roche attends a panel discussion after a Treaty on the Non-Proliferation of Nuclear Weapons (NPT) conference in Beijing, China, Thursday, Jan. (NPT) conference in Beijing consists of five permanent members (P5) China, France, Russia, the United Kingdom, and the United States. (Thomas Peter/Pool Photo via AP)
Delegation members from the UN Security Council's five permanent members (P5) from left; Andrea Thompson of the U. (NPT) conference in Beijing, China, Thursday, Jan. 31, 2019. The Treaty on the Non-Proliferation of Nuclear Weapons (NPT) conference in Beijing consists of five permanent members (P5) China, France, Russia, the United Kingdom, and the United States. (Thomas Peter/Pool Photo via AP)
Delegation members from the UN Security Council’s five permanent members (P5) from left; Andrea Thompson of the U. (NPT) conference in Beijing, China, Thursday, Jan. 31, 2019. The Treaty on the Non-Proliferation of Nuclear Weapons (NPT) conference in Beijing consists of five permanent members (P5) China, France, Russia, the United Kingdom, and the United States. (Thomas Peter/Pool Photo via AP)
The Director for Strategic Affairs, Security and Disarmament of the French Foreign Ministry Nicolas Roche attends a panel discussion after a Treaty on the Non-Proliferation of Nuclear Weapons (NPT) conference in Beijing, China, Thursday, Jan. (NPT) conference in Beijing consists of five permanent members (P5) China, France, Russia, the United Kingdom, and the United States. (Thomas Peter/Pool Photo via AP)
The Director for Strategic Affairs, Security and Disarmament of the French Foreign Ministry Nicolas Roche attends a panel discussion after a Treaty on the Non-Proliferation of Nuclear Weapons (NPT) conference in Beijing, China, Thursday, Jan. (NPT) conference in Beijing consists of five permanent members (P5) China, France, Russia, the United Kingdom, and the United States. (Thomas Peter/Pool Photo via AP)
U.S. Under Secretary of State Andrea Thompson, left, and Director General of the Department of Arms Control and Disarmament of the Chinese Foreign Ministry Fu Cong attend a panel discussion after a Treaty on the Non-Proliferation of Nuclear Weapons (NPT) conference in Beijing, China, Thursday, Jan. (NPT) conference in Beijing consists of five permanent members (P5) China, France, Russia, the United Kingdom, and the United States. (Thomas Peter/Pool Photo via AP)
U.S. Under Secretary of State Andrea Thompson, left, and Director General of the Department of Arms Control and Disarmament of the Chinese Foreign Ministry Fu Cong attend a panel discussion after a Treaty on the Non-Proliferation of Nuclear Weapons (NPT) conference in Beijing, China, Thursday, Jan. (NPT) conference in Beijing consists of five permanent members (P5) China, France, Russia, the United Kingdom, and the United States. (Thomas Peter/Pool Photo via AP)
Delegation members from the UN Security Council's five permanent members (P5) from left; Philip Barton of the United Kingdom, Andrea Thompson of the U. (NPT) conference in Beijing, China, Thursday, Jan. 31, 2019. The Treaty on the Non-Proliferation of Nuclear Weapons (NPT) conference in Beijing consists of five permanent members (P5) China, France, Russia, the United Kingdom, and the United States. (Thomas Peter/Pool Photo via AP)
Delegation members from the UN Security Council’s five permanent members (P5) from left; Philip Barton of the United Kingdom, Andrea Thompson of the U. (NPT) conference in Beijing, China, Thursday, Jan. 31, 2019. The Treaty on the Non-Proliferation of Nuclear Weapons (NPT) conference in Beijing consists of five permanent members (P5) China, France, Russia, the United Kingdom, and the United States. (Thomas Peter/Pool Photo via AP)
Deputy Director of the Department for Non-Proliferation and Arms Control of the Russian Ministry of Foreign Affairs Oleg Rozhkov attends a panel discussion after a Treaty on the Non-Proliferation of Nuclear Weapons (NPT) conference in Beijing, China, Thursday, Jan. (NPT) conference in Beijing of the UN Security Council consists of five permanent members (P5) China, France, Russia, the United Kingdom, and the United States. (Thomas Peter/Pool Photo via AP)
Deputy Director of the Department for Non-Proliferation and Arms Control of the Russian Ministry of Foreign Affairs Oleg Rozhkov attends a panel discussion after a Treaty on the Non-Proliferation of Nuclear Weapons (NPT) conference in Beijing, China, Thursday, Jan. (NPT) conference in Beijing of the UN Security Council consists of five permanent members (P5) China, France, Russia, the United Kingdom, and the United States. (Thomas Peter/Pool Photo via AP)

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