Vice President JD Vance said 21 hours of peace talks between the United States and Iran had failed to produce a deal to end the war.
Analysts said oil and natural gas energy companies would not quickly restore production unless attacks stopped and ships started moving through the Strait of Hormuz.
The American defense secretary warned President Trump could still order a commando raid to seize 970 pounds of enriched uranium buried in Isfahan if Iran does not agree.
A handful of vessels have crossed the crucial waterway since the U.S.-Iran truce began, but shipowners, insurers and others are wary of safe passage.
A handful of vessels have crossed the crucial waterway since the U.S.-Iran truce began, but shipowners, insurers and others are wary of safe passage.
The truce is under strain because of two issues, Lebanon and the Strait of Hormuz. U.S. and Iranian negotiators are scheduled to meet in Pakistan this weekend.
The U.K. government underlined its previous stance that the United States could only use British bases for defensive purposes, after President Trump threatened to strike civilian targets.
President Trump has threatened devastating attacks if Iran does not reopen the Strait of Hormuz. Some Iranians questioned what had happened to American values.
Rescue workers recovered four bodies from a residential building in the port city of Haifa after air defenses failed to intercept an Iranian strike, Israeli officials said.
An Iranian intelligence chief killed overnight on Monday was one of several Iranian officials who occupied their posts for only a few months.