Iran’s Islamic Revolutionary Guard Corps (IRGC) warned on Sunday that it would attack any military vessel that attempts to approach the Hormuz Strait. The guard denied “false” statements that the waterway is open for shipping. The guard said such moves would constitute a violation of the ceasefire agreement and provoke a strong reaction from Iranian armed forces. Earlier on Sunday, United States President Donald Trump ordered a blockade of the strait, also promising to clear it of naval mines, after an apparent failure of talks in Pakistan. Vessels of nations that paid tolls to Iran to ensure passage would be subject to interdiction. Last week, Washington and Tehran reached a fragile two-week truce to pave the way for diplomatic contacts. On the other hand, the negotiations in Islamabad have not resulted in a compromise.