Iran condemned the US-led strikes on jihadist militants in Syria on Tuesday as a violation of the country's sovereignty.
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"Any kind of military intervention in Syria without the demand of the government of this country and without abiding by international laws is not acceptable," Deputy Foreign Minister Hossein Amir-Abdollahian was quoted as saying by official news agency IRNA.
"War on terrorism cannot be used as a pretext to deny national sovereignty," he said, adding that Tehran would consult with Damascus and "international actors" including the United Nations about the strikes.
Tehran has been a staunch supporter of President Bashar al-Assad's regime in Syria, where Washington and Arab allies launched deadly air and sea strikes on the positions of Islamic State group jihadists.