BRUSSELS, May 21 (Xinhua) -- European Union (EU) top diplomat on Monday swept aside U.S. Secretary of State Mike Pompeo's speech on Iran, reiterating that there is no alternative to the landmark Iran nuclear deal.

"Secretary Pompeo's speech has not demonstrated how walking away from the JCPOA has made or will make the region safer from the threat of nuclear proliferation or how it puts us in a better position to influence Iran's conduct in areas outside the scope of JCPOA," Federica Mogherini, EU foreign policy chief, said in a statement.

"There is no alternative to the JCPOA," she stressed.

Pompeo on Monday rolled out a "new Iran strategy" in a speech at the Heritage Foundation, a U.S.-based conservative think tank, issuing tough rhetoric against Tehran and summoning calls for frustrated U.S. allies.

U.S. President Donald Trump decided earlier this month to quit Iran's nuclear deal, also known as the Joint Comprehensive Plan of Action (JCPOA), and vowed to re-impose sanctions, including oil embargo, on Tehran.