Iranian forces reportedly attacked a U.S. naval drone attempting to enter the Strait of Hormuz Sunday, just hours after striking ships in retaliation for U.S. attacks on three oil tankers.
The latest round of clashes, which began with U.S. raids last week, comes amid a deadlock in their six-month war.
Iran has maintained its stranglehold on the strategic Strait of Hormuz while Washington continues a counterblockade of Iranian ports.
Washington is also seeking to choke Iran's economy, rolling out sanctions on entities with financial links to the Islamic Republic in a bid to force it into submission.
The Islamic Revolutionary Guard Corps (IRGC), the ideological arm of Iran's military, said Sunday it "attacked an American military unmanned surface vessel" attempting to enter the strait, according to a statement carried by state television.
