The Middle East conflict began when the US and Israel attacked Iran in late February.
Tehran has since sought to limit traffic through the Strait of Hormuz, which normally carries about one-fifth of global oil consumption.
Iranian army spokesman Mohammad Akraminia said the strategic waterway would remain closed until Tehran’s demands were met by Washington.
No ‘perfect deal’
He also said Iran’s forces “are on higher alert and are stronger than they were at the beginning of the war”.
“They now possess greater motivation, commitment and self-confidence,” he added, state news agency IRNA reported on Saturday.
“Under the order of the Supreme Leader, the response of the armed forces will be immediate, effective and without geographical limitations.”
Revolutionary Guards spokesman Hossein Mohebbi told Fars news agency on Saturday that “the increase in the range of Iran’s missiles continues steadily”.
