Iran's new security chief, Mohsen Rezaei, warned Gulf states on Saturday against joining U.S. efforts to further isolate Iran, threatening to block oil exports from the Persian Gulf. In an interview with state media, Rezaei stated that any nation partnering in economic restrictions would be treated as an enemy and vowed to prevent "even a single drop of oil" from leaving the region. A former Revolutionary Guards commander and political hard-liner, Rezaei assumed his post two weeks ago.

The threat escalates an ongoing economic standoff. President Trump has warned of an "Economic D-Day" and a naval blockade, while Treasury Secretary Scott Bessent is expected to announce new measures Monday. Iran continues to disrupt shipping through the Strait of Hormuz, a critical oil transit route. In response, Saudi Arabia and Iraq have invested billions in alternative pipelines to bypass the strait.

Rezaei indicated Iran would first negotiate with countries joining U.S. pressure but would target all export routes if diplomacy fails. This marks a shift toward economic confrontation as the Trump administration intensifies financial pressure. Iran's economy, already in severe crisis with soaring prices and unemployment, faces further strain from damaged infrastructure and a fuel shortage, raising fears of domestic unrest.