Kofi Annan in a Twitter message on Wednesday, said: "The JCPOA was a hard-won diplomatic achievement...I deeply regret President Trump’s decision to withdraw, and urge all other signatories to renew their commitment to the deal and avoid a broader escalation of tensions across the Middle East."
Annan emphasised that after the JCPOA came into effect in January 2016, the International Atomic Energy Agency (IAEA) has repeatedly confirmed Iran’s implementation of its provisions.
US President Donald Trump announced on Tuesday that Washington would pull out of Iran nuclear deal and reinstate nuclear sanctions on Iran.
All other signatories to the JCPOA , including Russia, China, France, Germany,Britain and the European Union have repeatedly stressed that keeping the deal is in the interest of world peace and security.