The US carried out strikes on Iran’s Larak Island on Sunday, killing and injuring several soldiers and civilians, the Islamic Revolutionary Guard Corps (IRGC) said. The attack marked the first US military action inside Iran since late July, breaking a month-long lull in direct fighting.

Larak Island lies near the narrowest point of the Strait of Hormuz, a vital shipping route that has remained heavily restricted since the war began. Explosions were heard near the island late on Sunday, Iran’s semi-official Fars News Agency reported.

US forces allegedly targeted two Iranian launchers based on the island, Axios reported, citing US Central Command spokesman Capt. Tim Hawkins.

“Revolutionary Guard forces were observed preparing to launch rockets carrying sea mines toward the Strait of Hormuz,” Hawkins said, without immediately providing supporting visual evidence.

The IRGC vowed retaliation, saying the attack had caused the “martyrdom and injury of several of our fighters and fellow citizens.”

“This action will be answered by the sons of the Islamic Republic of Iran, and the aggressors will face definite punishment,” the IRGC said. It accused the “American-Zionist enemy” of acting out of “desperation over internal problems” and declining credibility in the region, describing the strike as another attempt to “revive its sinister role and sway public opinion.”

The statement opened with a pledge that Iran would “surely take retribution from the criminals” and said the attack would be met with a response “that includes punishment for the aggressor.”

The strike came less than a week after the US military said it had finished clearing sea mines from international shipping routes through the Strait of Hormuz. Washington separately maintains a naval blockade on vessels entering or leaving Iranian ports.

The attack followed a relative lull in direct US military action against Iran. The last major US strikes inside the country were carried out on July 29, shortly after an Iranian missile attack on a US base in Jordan.

Last week, Washington announced what it called an “economic onslaught” against Iran, as the Trump administration shifted its emphasis from large-scale military action toward economic pressure. The move came amid reports of dwindling US stockpiles of critical munitions and interceptors, although President Donald Trump has vehemently denied that the military is running short.

The latest wave of US sanctions targets entities, individuals and vessels in multiple jurisdictions, with Washington saying it aims to isolate Tehran financially and cut off revenue available to the Iranian government.