IRNA � It is essential that all parties continue to fulfill their commitments to the nuclear deal reached between Iran and the G5+1 (US, UK, France, Russia, China plus Germany) in 2015.

The nuclear deal is 'a milestone accomplishment of international diplomacy', Dutch Ambassador to the United Nations Karel van Oosterom said on Thursday while addressing a meeting of the UN Security Council on non-proliferation of weapons of mass destruction.

The Joint Comprehensive Plan of Action (JCPOA) has been proved to be a success, as verified by the International Atomic Energy Agency (IAEA), the UN nuclear watchdog, he said.

Van Oosterom, whose delegation was the facilitator for the UN Resolution 2231, said it is essential that all parties continue to fulfill their commitments to the JCPOA.

The US President Donald Trump said on Friday that European allies and Congress have to work with him to fix �the disastrous flaws� in the nuclear pact or face a US exit.

Trump is after changing the text of the international nuclear accord.

Iran has repeatedly stressed that the JCPOA is not renegotiable.