Iran's foreign minister is blaming regional countries and their "U.S. masters" for an attack on a military parade that led to heavy casualties.
Mohammad Javad Zarif on Twitter also warned that "Iran will respond swiftly and decisively in defense of Iranian lives" after the attack in Ahvaz.
Zarif said that children and journalists were casualties in the attack.
He added that the gunmen were "terrorists recruited, trained, armed & paid by a foreign regime."
He did not immediately elaborate. However, Arab separatist groups in the region have launched attacks on oil pipelines there.
