Deputy secretary general of the Drugs Control Headquarters said on Tuesday that 553 tons of different types of illicit drugs was confiscated in Iran last year.
Alireza Jazini made the remarks during a visit of Interior Minister Abdolreza Rahmani Fazli to the headquarters.
Jazini said that 350,000 people were arrested for drug-related crimes or abuse of narcotics last year.
He added that narcotics are a complicated and multi-dimensional issue.
He expressed concern about new issues such as the drop in the age of people who pick up the habit, addiction rate, relations between drug trafficking and political and security issues and a change in the pattern of drug consumption from traditional to industrial.
He said that narcotics production in Afghanistan has risen up.
He criticized the international organizations for negligence about the international campaign against drug-trafficking.