Speaking on Sunday night, a spokesperson for the Khatam Al Anbiya Central Headquarters strongly condemned the operation, saying the US navy had violated the ceasefire by targeting and boarding the vessel.

He warned that Iran’s armed forces would respond decisively.

“The Islamic Republic of Iran will soon retaliate against this act of armed piracy by the US military,” he added.

“The United States, as the aggressor, violated the ceasefire and engaged in maritime piracy by opening fire on an Iranian merchant vessel in the Sea of Oman,” Lieutenant-Colonel Ebrahim Zolfaghari said.

“Its forces then boarded the ship and disabled its navigation systems.”

According to Iranian accounts, US forces launched an unprovoked attack on the container ship Toska, which had been travelling from China to Iran through the Gulf of Oman.

Iranian forces reportedly responded swiftly, launching drone strikes against several US military vessels operating in the area.

US President Donald Trump later confirmed that American forces had seized the Iranian ship, praising US military strength and describing it as the world’s most powerful force — remarks that Iranian officials dismissed as further evidence of Washington’s conduct in international waters.

Iran has repeatedly stated that it will respond firmly to any hostile actions by the United States.

Alongside Washington’s announcement of a naval blockade, Tehran declared the full closure of the Strait of Hormuz, warning that any vessel attempting to pass without its authorisation would face decisive action.

Iranian authorities say the latest incident underscores what they view as the United States’ ongoing role in fuelling instability across the region.

Tehran has reiterated that it remains fully prepared to defend its sovereignty and national interests and will not hesitate to respond forcefully to any act of aggression or maritime violation.