US President Donald Trump's administration declared that Iran was complying with its nuclear agreement with world powers, but warned that Tehran was in default of the spirit of the accord and that Washington would look for ways to strengthen it.
It was the second time Trump certified Iranian compliance with the agreement since he took office in January.
Trump administration officials, briefing reporters on Monday on the decision, said new economic sanctions against Iran were being prepared over its ballistic missile program and for contributing to regional tensions, Reuters reported.
Under U.S. law, the State Department must notify Congress every 90 days of Iran's compliance with the so-called Joint Comprehensive Plan of Action (JCPOA). Trump had faced a congressionally mandated deadline of Monday to decide.
