Iranian President Mahmoud Ahmadinejad says Western powers seek to attack nations through spreading drug abuse and addiction in other countries.
"Today, they (Western powers) have begun harming nations, especially the Iranian nation by drugs," President Ahmadinejad said in Tehran's Azadi Stadium on Sunday.
He made the remarks in a gathering of 20,000 of recovered addicts on the International Day against Drug Abuse and Illicit Trafficking.
"Arrogant states masquerade themselves behind the so-called humanitarian masks and they want to stir a sense of inability in other nations," Ahmadinejad said.
“They put on masks of freedom-seeking, human rights, and protecting people but in fact they are the biggest criminals in the world,” he added.
In April, Iran was re-elected as a member of the International Narcotics Control Board by the United Nations Economic and Social Council for another five-year term.
According to the UN, Iran ranks first among all countries in shutting down drug routes into its territory.
With a 900-kilometer (560-mile) common border with Afghanistan, Iran has been used as the main conduit for smuggling Afghan drugs to narcotic kingpins in Europe.
The Iranian government has spent more than USD 700 millions to seal its borders and prevent the transit of illicit drugs destined for European, Middle Eastern and Central Asian countries.