WASHINGTON - The United States said on Thursday that a US Navy ship had "destroyed" an Iranian drone in the Strait of Hormuz after the aircraft threatened the vessel, but Iran said it had no information about losing a drone.

In the latest episode to stir tensions in the Gulf, US President Donald Trump told an event at the White House that the drone had flown to within 1,000 yards (meters) of the USS Boxer and had ignored "multiple calls to stand down".

Iranian Foreign Minister Mohammad Javad Zarif told reporters at the United Nations: "We have no information about losing a drone today."

The Pentagon said in a statement that the USS Boxer, an amphibious assault ship, had taken "defensive action" against a drone on Thursday morning as the Boxer was moving into the Strait of Hormuz.

"We do assess it was an Iranian drone," said Commander Rebecca Rebarich, a Pentagon spokeswoman.

Tensions in the Gulf region are high, with fears that the United States and Iran could stumble into war.

The United States has blamed Iran for a series of attacks since mid-May on shipping around the Strait of Hormuz, the world's most important oil artery. Teheran rejects the allegations.

Iran in June shot down a US military surveillance drone in the Gulf with a surface-to-air missile. Iran says the drone was in its airspace, but Washington says it was in international skies.

Trump said at the time the United States had come close to launching a military strike on Iran in retaliation for the downing of the US drone.

The United States believes that Iran-linked militia in Iraq have recently increased their surveillance of American troops and bases in the country by using off-the-shelf, commercially available drones, US officials say.

A US official, speaking on condition of anonymity, said the drone on Thursday was brought down through electronic jamming.

Relations between the United States and Iran have worsened since last year when Trump abandoned a 2015 deal between world powers and Iran in which Teheran agreed to restrict nuclear work in return for the lifting of sanctions.

The United States has re-imposed sanctions to throttle Iran's oil trade and says it wants to increase pressure on Teheran to renegotiate the accord, discuss its ballistic missile program and modify its behavior in the Middle East.

REUTERS