Iran has released 10 US sailors held for entering its territorial waters, in a swift resolution of an incident that tested newly-improved US-Iranian ties. They were detained Tuesday after one of their two vessels broke down during a training mission in the Gulf. Iranian state media said the group was released into international waters after apologising.
It comes at a sensitive time, as the US and Iran try to implement the deal on Iran's nuclear activities. The incursion was "unintentional", a statement from the Revolutionary Guards quoted by state media said.
Earlier, the naval commander of the Guards, General Ali Fadavi, said investigations found a navigational failure was to blame. "We have concluded that passage of Americans in our territorial waters was not a hostile passage or for espionage or similar acts," he told Iranian television.
A Pentagon statement said the sailors had been safely returned, and that an investigation was under way as to how they entered Iranian waters. Iran-US relations pass a test: Jonathan Marcus, BBC diplomatic correspondent The tentative and still largely potential softening of relations between Washington and Tehran in the wake of the nuclear deal seems to have passed a delicate initial test.
The Tehran authorities have quickly accepted that the US patrol boats strayed into their waters by accident and the crews - according to Iranian State Television - have now been released.
The process to begin lifting the sanctions imposed on Iran due to its nuclear activities is expected to get under way at the end of this week. There are many conservatives and hardliners in both countries who would dearly love to sabotage the deal and consequently both governments may well have been eager to get this episode resolved as quickly as possible.
Clearly the economic benefits of lifting the sanctions may have been too great an inducement for the agreement to be derailed now. US Secretary of State John Kerry called Foreign Minister Javad Zarif shortly after the incident. The pair developed a personal rapport during the nuclear talks. Those detained - nine men and one woman - were taken to Farsi Island, in the middle of the Gulf, where Iran has a naval base.
Pictures published on the Revolutionary Guards' website showed the group sitting on a Persian rug, with the one female member wearing a headscarf. Iran's influential Revolutionary Guard - tasked with protecting the country's 1979 Islamic revolution - has strongly defended Iranian sea borders in the past.
Fifteen British sailors and marines were held for 13 days in 2007 after they were captured in a disputed area between Iran and Iraq. Despite last year's breakthrough nuclear deal tensions remain between the US and Iran. In December, Iran's navy conducted rocket tests near US warships in the Strait of Hormuz, something the US called "highly provocative".