The U.S. and Iran failed to reach a peace deal after 21 hours of negotiations.
President Donald Trump announced "major combat operations" against Iran on Feb. 28, with massive joint U.S.-Israeli strikes targeting military and government sites.
Trump set a deadline for Iran to fully reopen the Strait of Hormuz or face broad strikes on its critical infrastructure. Hours before the deadline expired, Trump said he had agreed to suspend planned bombing for two weeks if Iran agreed to reopen the Strait of Hormuz.
Iranian Foreign Minister Abbas Araghchi then said that "safe passage through the Strait of Hormuz will be possible via coordination with Iran's Armed Forces and with due consideration of technical limitations."
Israeli Prime Minister Benjamin Netanyahu said he supported the ceasefire with Iran, but that Lebanon -- where intense Israeli strikes continued -- was not covered by the agreement, despite Iranian protests.
Kuwait's Ministry of the Interior is urging residents to stay indoors from midnight until 6 a.m. on Wednesday as a "precautionary measure."
The ministry said the advisory is being issued "as a precautionary measure aimed at safeguarding everyone's safety, strengthening the level of prevention, and enabling security authorities to perform their duties with high efficiency."
The U.S. carried out strikes against approximately 50 military targets on Kharg Island on Tuesday that had previously been struck last month, according to a U.S. official.
In mid-March, the U.S. struck 90 military targets on the island, which is Iran’s oil transportation hub. Those 90 targets were described then as including storage bunkers for naval lines and missiles, and other military infrastructure.
The island itself is roughly the same size as Key West, Florida, or a third the size of the island of Manhattan.
-ABC News' Luis Martinez
Israel is "crushing" the Iranian regime "with increasing force," Israeli Prime Minister Benjamin Netanyahu said in a statement Tuesday.
“Yesterday we destroyed transport planes and dozens of helicopters, and today we attacked the railroads and bridges used by the Revolutionary Guards," Netanyahu said.
"Yesterday our pilots destroyed transport planes and dozens of helicopters at an Iranian air force base. Today they attacked the railroads and bridges used by the Revolutionary Guards," Netanyahu added. "They use them to transport raw materials for weapons, weapons, and the activists who attack us, the U.S. and the countries of the region."
When asked by reporters if he expected Iran to come to the negotiating table, Secretary of State Marco Rubio said "hope we have more news later today on that."
"The whole world’s been impacted, unfortunately, because Iran is violating every law known by striking commercial vessels in the Strait of Hormuz, and it’s a big problem for the world," he said.
