Iran's Islamic Revolution Guards Corps (IRGC) said its forces had struck key infrastructure and facilities at four US bases in Kuwait and Bahrain, in a statement issued after renewed US strikes on Iran on July 9.

The Iranian strikes follow more than 90 sites across southern Iran which were targeted by the US military in the early hours of the morning. 

In what it called the first stage of a "punitive response," the IRGC said its naval and aerospace forces had struck the bases of Arifjan and Ali al-Salem in Kuwait and Jufair and Sheikh Isa in Bahrain in a joint missile and drone operation, an hour after US attacks on various parts of Iran.

The IRGC said the US had violated its commitments by striking multiple points in Iran's southern coastal provinces, and had also hit two bridges in eastern provinces on the route towards Mashhad, where the late leader of the Islamic Revolution was to be buried. The claims could not be independently verified.

The Guards warned that further US strikes would draw broader responses against other US bases in the region. 

Following the repeated strikes between the two, Iran's Chief Negotiator and Parliament Speaker Mohammad Bagher Ghalibaf wrote on social media platform X in Persian, "America still hasn’t learned that bullying and breaking promises are no longer cost-free. Let me put it plainly: if you strike, you’ll get hit. Don’t flail around pointlessly, or you’ll sink even deeper: the Strait of Hormuz will only open with "Iranian arrangements," not American threats."

The strikes followed the US Treasury's revocation of a licence allowing sales of Iranian oil after three commercial ships were hit in the Strait of Hormuz, and US President Donald Trump's declaration that the ceasefire was over.

The memorandum signed last month had extended the ceasefire for 60 days, following conflict that began with US-Israeli strikes on Iran on February 28. 

The attacks on Iran in recent hours have so far resulted in 14 deaths and 78 injuries. Of the injured, 47 are still hospitalised, while the others have been discharged after receiving medical treatment, Iran Student News Agency reported.

US President Donald Trump, on the sidelines of the Nato Summit, said that Iranian leaders were "scum." he later added on his return to the US that they were also "crazy" following a string of social media posts showing strikes on Iran.