GENEVA (Reuters) - The detained British-flagged tanker Stena Impero must go through a legal process because it violated maritime regulations, Iran's Foreign Minister Mohammad Javad Zarif told British Foreign Minister Jeremy Hunt in a phone call on Saturday, the Iranian news agency ISNA reported.

The Stena Impero was detained because of an accident with an Iranian fishing boat and is being held at the Iranian port of Bandar Abbas for investigations, an Iranian maritime official said earlier on Saturday.

GRAPHIC: Map of tanker's route - tmsnrt.rs/2O646ZX

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(Reporting By Babak Dehghanpisheh; Editing by Gareth Jones)