British Foreign Secretary Jeremy Hunt spoke with his Iranian counterpart, Javad Zarif, over the phone on Saturday. The two discussed the Grace I, the Iranian oil tanker seized by British Royal Marines off the coast of Gibraltar on July 4th.

Hunt said in a tweet on Saturday, "Just spoke to Iranian Foreign Minister Zarif. Constructive call. I reassured him our concern was destination not origin of the oil on Grace One that UK would facilitate release if we received guarantees that it would not be going to Syria, following due process in Gib(Gibraltar) courts."

In another tweet Hunt said, "Was told by FM Zarif that Iran wants to resolve issues and is not seeking to escalate."