Anti-narcotics police forces became suspicious of three cars and forced them to stop, but the smugglers opened fire and fled away on foot.
Police forces busted three of their cars and during the cleaning operation, 4.6 tons of illicit drugs as well as weapons and ammunition were found.
Iran's Sistan-Baluchestan Province has 1,100 km of joint borders with Afghanistan and Pakistan. Much of the illicit drugs are believed to be produced in the two countries.
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