Sri Lanka, March 26 -- Iran has turned back a vessel headed for Karachi at the Strait of Hormuz, delivering a sharp blow to Pakistan's projection of itself as a mediator in the ongoing Iran-US conflict.

The move comes even as Islamabad has been positioning itself as a potential host for talks between Washington and Tehran, a claim now facing serious credibility questions.

The Iranian Embassy in Kabul confirmed the action, stating, "The container ship SELEN was turned back by the IRGC Navy due to failure to comply with legal protocols and lack of permission to pass through the Hormuz Strait."

Authorities reiterated that all vessels must secure clearance and coordinate with Iran's maritime system before passing through the strategic waterw...