Ceasefire Between U.S. and Iran Faces Challenges Over Lebanon and Strait of Hormuz

A two-week ceasefire agreement between the United States and Iran is encountering significant challenges due to disagreements over military actions in Lebanon and the reopening of the Strait of Hormuz. The ceasefire, which began with the condition that Iran would reopen the strategic waterway and halt attacks on U.S., Israeli, and regional targets, is now at risk of collapse ^[1][2].

Iran’s Supreme National Security Council confirmed its acceptance of the ceasefire, with negotiations scheduled to commence in Islamabad on April 10, 2026 ^[1]. However, Israel has stated that the ceasefire does not extend to its ongoing conflict with Hezbollah in Lebanon, a point of contention that Iran disputes ^[1][3].

Iranian Foreign Minister Abbas Araghchi has indicated that Iran will allow ships to pass through the Strait of Hormuz in accordance with international law, contingent upon the cessation of U.S. aggression and Israeli attacks in Lebanon ^[4]. Despite this, Iran has accused the U.S. and Israel of violating the ceasefire, citing continued Israeli strikes in Lebanon and other breaches, and has threatened to withdraw from the negotiations ^[5].

The situation is further complicated by reports from Iran’s semiofficial news agencies suggesting that the Revolutionary Guard placed sea mines in the Strait of Hormuz during the conflict ^[6]. Iran has also demanded the right to collect tolls from ships passing through the strait, a proposal that has not been confirmed as part of the ceasefire agreement ^[7].

Oil prices remain elevated due to the uncertainty surrounding the strait, with Brent crude trading at approximately $98 per barrel, a 35% increase since the conflict began ^[8]. Sultan al-Jaber, head of a UAE oil company, reported that 230 oil-loaded ships are currently waiting to transit the strait ^[9].

What Is Known

The ceasefire agreement was contingent on Iran reopening the Strait of Hormuz and halting attacks on U.S., Israeli, and regional targets ^[1]. Iran has agreed to allow coordinated passage through the strait for two weeks, marking the first reopening since the war began ^[10].

What Remains Unclear

There is ongoing dispute over whether the ceasefire includes a halt to fighting between Israel and Hezbollah in Lebanon, with differing claims from involved parties ^[3]. Additionally, the status of the Strait of Hormuz remains contentious, with conflicting reports on whether it is open or closed ^[11].