The United States expanded its airstrike campaign against Iran early Friday by hitting more bridges, energy sites and collapsing a tower at a key Iranian port.
U.S. Central Command announced it has begun launching "additional strikes against Iran," hours after Trump said the ceasefire was over.
The U.S. military has attacked Iran after it said Tehran struck three ships in the Strait of Hormuz.
Crowds of hundreds of thousands chanted "Death to America" and "Death to Israel," as they called for revenge over the Feb. 28 attack.
Iran has begun a dayslong funeral for the late Supreme Leader Ayatollah Ali Khamenei, months after an airstrike killed him at the start of the war.
After four days of trading strikes, both sides appeared to pause their attacks Monday.