DUBAI, United Arab Emirates — Iran and Oman’s foreign ministers met on Saturday to discuss the Strait of Hormuz that lies between them, after days of Iranian attacks on ships and U.S. retaliation that dealt a blow to the interim deal to end the war. Iran’s new supreme leader, still unseen since the war began, vowed in his first statement since the funeral of his father, Ayatollah Ali Khamenei that Iranians would avenge his killing in the war’s opening strikes on Feb. 28. Such revenge “is the will of our nation and must certainly be carried out,” Supreme Leader Mojtaba Khamenei said in a statement carried on state television, hours after U.S. President Donald Trump threatened more missile attacks. Oman said it and Iran agreed to keep talking about the crucial waterway “at the technical and political levels,” a day after the United States called on Iran to publicly say the crucial waterway is open and ships won’t be attacked. Iran accuses Washington of violating the interim deal Iranian Foreign Minister Abbas Araghchi said he met with his counterpart in Oman to discuss “