US Central Command (CENTCOM) confirmed on Sunday night that it has launched a new wave of strikes on Iran.
The announcement followed explosions that were reported in Bandar Abbas, Qeshm Island, and Sirik.
According to the Iranian Fars News Agency, more than 10 explosions were heard in Bandar Abbas and Sirik.
"At 5 p.m. ET today, U.S. Central Command forces began launching more strikes against Iran to continue degrading their ability to attack civilian mariners and commercial ships freely transiting the Strait of Hormuz," said CENTCOM.
It added, "The Commander in Chief has directed the strikes to hold Iranian forces accountable."
Iran's official news agency, IRNA, later reported that one person was killed and four others were injured in a US military strike in Khuzestan Province, southwestern Iran.
According to the report, the target struck was a central water pumping station in the port city of Mahshahr.
The strikes mark the second night in a row that the US has struck targets in Iran, and the fourth time this past week.
Early Sunday morning, CENTCOM announced that American forces had launched a third round of strikes against Iran, following an attack by Islamic Revolutionary Guard Corps forces on a commercial vessel in the Strait of Hormuz.
According to a CENTCOM statement, "US forces hit approximately 140 Iranian military targets with precision munitions launched by land- and sea-based fighter aircraft, drones, and naval vessels. Targets included Iranian missile and drone sites, naval capabilities, ammunition storage facilities, communication networks, and coastal surveillance locations."
Hours after the US strikes, sirens went off in Bahrain, warning of an Iranian attack.
The United Arab Emirates Ministry of Defense also announced that the country's air defense systems are active and intercepting missile and drone threats launched from Iranian territory.
The Ministry of Defense of Qatar announced that the country's security and air defense forces successfully intercepted a missile attack aimed at Qatari territory.
The announcement followed loud explosions heard in the skies over the capital, Doha, and surrounding areas, which resulted from the activation of the interception systems.