(CNN) The British-flagged oil tanker Stena Impero is "free to leave," Iranian officials said Monday, marking the end of a two-month standoff between Tehran and London over the detained vessel.

Iran's government spokesperson, Ali Rabiei, said that the legal process relating to the ship's seizure had been concluded and it was free to sail on to its destination, according to the country's semi-official Fars News Agency.

Rabiei did not say when the tanker would actually commence its voyage or re-enter international waters.

Erik Hanell, president and CEO of Stena Bulk, which owns the Stena Impero, told CNN Monday that the tanker is still in the port of Bandar Abbas, in the Persian Gulf, where it was initially seized by Iranian Revolutionary Guard (IRGC) forces. "We have no further information about it," Hanell said.

This announcement comes a day before UK Prime Minister Boris Johnson and Iranian President Hassan Rouhani are due to meet on the sidelines of the United Nations General Assembly in New York.

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