If Iran's nuclear file is sent to the United Nations Security Council, then Iran will withdraw from the Non-Proliferation Treaty (NPT), Iran's Foreign Minister Mohammad Javad Zarif said Monday, according to the official IRNA news agency.

"If the Europeans continue their improper behavior or send Iran's file to the Security Council, we will withdraw from the NPT," IRNA quoted Zarif as saying.

Iran is planning "one last step" in its gradual draw-down from complying with the nuclear deal, raising the possibility that it's close to announcing a complete withdrawal from the embattled international accord.