India, Sept. 8 -- Iran has issued a fresh warning to the United States, saying continued economic pressure could prompt Tehran to establish a maritime exclusion zone across the Persian Gulf. The warning comes as efforts to ease the conflict remain stalled and tensions continue to spread across the region. Mohsen Rezaei, secretary of Iran's Supreme National Security Council, said Tehran had changed its approach towards US military assets in response to Washington's actions.

He warned that economic warfare could be met with restrictions extending across the Gulf and towards the existing blockade perimeter. The latest threat comes after months of escalating tensions between Iran and the US, with military strikes, sanctions and disputes over...