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Iran has detained a German national for taking photos of "sensitive oil centres" in the country's south-western province of Khuzestan, Iranian daily Jam-e Jam reported on Tuesday.

"The German national was detained while taking photos of Aghajari oil field in Khuzestan province," the report said, without elaborating.

The Iranian judiciary had yet to comment on the report.

The news comes as Germany's foreign minister summoned Iran's envoy to Berlin for the second time in a week over Tehran's executions.Ìý

Iran has been at odds with Western powers over what it calls their interference in its internal matters during months of anti-government protests sparked by the death in custody of a young Iranian-Kurdish woman in September.

The Islamic Republic has accused Western countries, Israel and Saudi Arabia of fomenting the unrest. Its allegations have been accompanied by arrests of dozens of dual-nationals and foreigners.Ìý

(Reuters)