Intense clashes have taken place in the Iranian city of Zahedan, as anti-government unrest grips the country.

Social media footage showed security forces firing into crowds, four weeks after dozens were killed in protests there over allegations a teenage girl was raped by a senior policeman.

State media said one person was killed and 14 injured in Friday's violence.

Iran has also been rocked by wider protests sparked by the death of a young Kurdish woman in police custody.

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