Tasnim did not give details of the Alborz's mission but said Iranian warships had been operating in open waters to secure shipping routes, combat piracy and carry out other tasks since 2009.
Yemen's Iran-backed Houthis have been targeting vessels in the Red Sea since November to show their support for the Palestinian terrorist group Hamas in its war with Israel.
In response, many major shipping companies have switched to the longer and more costly route around the Africa's Cape of Good Hope rather than pass through the Suez Canal, which handles about 12% of global trade.
The Alborz warship entered the Red Sea via the Bab al-Mandab Strait, Tasnim said, without saying when. There were unconfirmed reports on social media it arrived late on Saturday. READ MORE