TEHRAN: Iran’s navy warned a US warship to leave an area where Iran has been conducting a naval drill near the narrow Strait of Hormuz at the mouth of the Persian Gulf, the semi-official Fars news agency reported on Wednesday.

The US Navy denied that its operations in the region were affected.

The Iranian navy chief, Adm Habibollah Sayyari, was quoted as saying that the US warship received two warnings before leaving the region. “They were warned once by maritime patrol aircraft and once again by the Alborz destroyer,” he said.

“The US warship left the region immediately after receiving the warning,” he added, saying he believed that the Americans had approached the area to “learn our tactics”.

Iran said the naval drill got underway on Wednesday over an area of three million square kilometres, including part of the Strait of Hormuz, through which one-fifth of the world’s oil supply passes, as well as the Gulf of Oman and neighbouring parts of the Indian Ocean.

It is the first Iranian naval exercise since 10 US sailors were briefly captured by Iran earlier this month after drifting into Iranian territorial waters.

Cmdr Kevin Stephens, a spokesman for the US Navy’s 5th Fleet, offered a different version of events.

He said the US was aware of the Iranian exercise and that it had not altered US naval operations in any way. Iran had announced plans to close off certain areas for the drill, but he said this was “common practice for any navy conducting such training at sea”.

“Our forces similarly announce closure areas for our training events. We do not consider such announcements to be orders,” Stephens said.

Iran conducts similar exercises annually and the US does not see this year’s as a change in Iranian behaviour, Stephens added.

The 5th Fleet is the US Navy’s regional counterweight to Iran and is based across the Gulf from Iran in the island kingdom of Bahrain.

On Tuesday, Sayyari said many types of missiles and torpedoes would be launched during the manoeuvres.

Iran occasionally holds military manoeuvres to ensure the preparedness of its forces and to demonstrate its military capabilities in the region.

The county has more than 2,000 kilometres of shoreline facing the Persian Gulf and the Sea of Oman.

Published in Dawn, January 28th, 2016