The Adrian Darya 1 -- formerly the Grace 1 -- left Gibraltar on Aug 18. Ship-tracking data on Tuesday showed the vessel was heading towards the Greek port of Kalamata
The Grace 1, renamed the Adrian Darya 1, left anchorage off Gibraltar late on Sunday
Pompeo says tanker's release unfortunate
Zarif was speaking in Finland after meeting Foreign Affairs Minister Pekka Haavisto, who said Europe was doing its best to salvage the deal.
Gibraltar turns down US detention request
British Royal Marines seized the vessel in Gibraltar in July