The crash occurred with the Middle East still reeling after Iran and Israel exchanged fire the previous day.
The deal would extend the ceasefire by 60 days and reopen the Strait of Hormuz as new talks are held on Iran’s disputed nuclear program.
Iran and the United States have reached an impasse again over how to end their war. Their ceasefire is growing increasingly shaky.
The blockade, announced by U.S. Central Command, will affect vessels entering or leaving Iranian ports.
Trump has warned Iran that the U.S. could set the country 'back to the stone ages,' including targeting power plants and bridges.
Israel has attacked a major petrochemical plant in Iran's South Pars natural gas field and killed a top Revolutionary Guard commander.
Israel’s defense minister says the military killed top Iranian security official Ali Larijani in an overnight strike.
In addition to striking Tehran on the fifth day of the conflict, Israel hit the Iranian-backed Hezbollah militant group in Lebanon.
Qatari Foreign Ministry spokesman Majed Al Ansari vowed that Iranian attacks on the gas-rich country “will not go unanswered.”
The briefing comes as the conflict has intensified into a wider war in the region.