Britain could be softening their position to allow for the release of Tehran's oil tanker Grace 1 - seized by United Kingdom authorities in July - after the exchange of documents between the two countries, Iran media report.
The commandeering of the Grace 1 on July 4 exacerbated frictions between Tehran and the West and led to retaliatory moves in Gulf waterways used to ship oil.
"Britain is interested in releasing Iran's oil tanker Grace 1. following the exchange of some documents, we hope the release will take place soon", the deputy head of Iran's ports and Maritime Organization, Jalil Eslami, said in remarks reported by IRNA news agency.
"The vessel was seized based on false allegations.it has not been freed yet", Mr Eslami said.
The Gibraltar government says it is seeking to "deescalate" the situation over the Grace 1.
A court in Gibraltar was set to decide the fate of the ship on Thursday, when an order for its detention lapses.
Quoting Gibraltar authorities, the semi-official FARS news agency said the ship will be released by Tuesday evening.
Tanker Trackers, a company that monitors ship movements, said Grace-1 was sending signals on Monday that indicate it will leave Gibraltar toward a destination in Morocco, although the vessel is still in Gibraltar.
On July 19, Iran's Revolutionary Guards impounded the British-flagged Stena Impero oil tanker in the strategic Strait of Hormuz for breaking "international maritime rules".
The UK has seized Iran's supertanker deliberately, he deplored, adding that the documents on the settlement of the issue have already been exchanged between Iran and the UK.
The Iranian capture of the Stena Impero drew condemnation from Britain and other European parties to the nuclear deal that have been trying to salvage it by shielding Iran's economy from reimposed and toughened US sanctions.