The United States struck Iranian targets in Goruk and Qeshm Island, both located along the Strait of Hormuz, US Central Command (CENTCOM) announced on Monday on X/Twitter.
According to CENTCOM, the attacks were in response to Iran's downing of an American MQ-1 Reaper drone.
Fighter jets had also been heard over several parts of Tehran, Iran International reported on Monday, citing residents of the city.
Additionally, three explosions were heard in Bandar Abbas on the Strait of Hormuz on Monday morning, according to the outlet.
The IRGC later confirmed that it had struck a US air base after an American attack reportedly launched from it targeted a telecoms tower on Sirik Island.
No exact location of the base was given, but CENTCOM confirmed that no US personnel were harmed in the strike.
Sirens sound in Kuwait
Also on Monday, Kuwait's air defense systems worked to intercept missile and drone attacks, according to its official X account.
The Kuwaiti Army said that its air defenses were "currently confronting hostile missile and drone attacks."
"The General Staff of the Army notes that if explosion sounds are heard, they result from the air defense systems intercepting the hostile attacks," the statement added.
CENTCOM also issued a statement that its forces had intercepted two Iranian ballistic missiles launched towards Kuwait on Sunday night.
"These missiles were immediately defeated, and no American personnel were harmed," CENTCOM wrote on X.