No US aircraft were shot down near Bushehr, Iran, despite a claim made on Iranian state TV, US Central Command announced early on Friday.
Iran's state TV said early on Friday that a US aircraft was destroyed in Iran's Jam governorate in Bushehr, citing its governor, Masoud Tangestani.
Explosions were also heard near the Strait of Hormuz and Bandar Abbas, Iran's semi-official Tasnim news reported on Thursday night.
Tasnim later reported that the sounds came from exchanged fire made in warning to ships in the Strait of Hormuz.
Semi-official Fars news agency also said on Thursday that Iran's armed forces carried out a missile launch operation from the southern region of the country toward specified targets, and that the destination of the missiles was not yet clear.
Iran targets US airbase
Earlier on Thursday, Iran's Revolutionary Guard said that it targeted a US airbase after the US military carried out what a Washington official said were strikes targeting an Iranian drone operation near the Strait of Hormuz, hours after US President Donald Trump rejected a report he was close to a compromise deal with Tehran.
The escalation in hostilities highlighted threats to the tenuous ceasefire between the US and Iran that took effect in early April, dampening hopes for a peace deal and sending oil prices surging again.
Reuters and Goldie Katz contributed to this report.