Qeshm Island was also damaged by air strikes earlier in the year. ( AP: Asghar Besharati )
A US official says strikes have been carried out on Iranian targets in the Strait of Hormuz.
It follows reports by Iranian state television that explosions were heard on Qeshm Island.
The strikes come on the eve of the crucial midterm elections in the US.
The US has conducted strikes on Iranian targets in the Strait of Hormuz, according to a US official.
Iranian state television reported that explosions were heard on Qeshm Island, which is an Iranian island in the strait.
The official, who was not authorised to comment publicly and spoke on the condition of anonymity, said the US had targeted "Iranians using surface-to-air missiles against US assets".
Qeshm Island is in the Strait of Hormuz. ( AP: Asghar Besharati )
The strikes, which appeared to be limited as opposed to a full return to hostilities, came on the eve of the crucial American midterm elections .
President Donald Trump has previously said the US would not launch strikes on Iran before the midterms.
The unpopular Iran war and the resulting impact on US fuel prices and other parts of the economy has been a vulnerability for Republicans as they try to keep control of Congress.
Vice President JD Vance told reporters earlier on Monday, local time that he had just spoken to Mr Trump about talks with Iran and said that "the president and I both feel pretty good about the prospects for potentially coming to a negotiated settlement".
