Iran's Supreme Leader Ayatollah Ali Khamenei said on Wednesday that the US is using “money and sex” to infiltrate Iran.
Khamenei warned that the Islamic Republic should be aware of the "enemy's trap."
"The enemy sets up a network within a nation and inside a country mainly through the two means of money and sexual attractions to change ideals, beliefs and consequently the lifestyle," he said.
His comments follow the recent wave of arrests of pro-Western journalists and writers. Iranian authorities say these actions are necessary to prevent Western infiltration.
On the other hand, the recent arrests are criticised by Iran’s moderate President Hassan Rouhani who claimed hard-liners are “exaggerating the issue.”
Rouhani says hard-liners are manipulating Khamenei’s warnings to justify detentions.
This month's arrests of pro-Western journalists, writers and filmmakers are widely seen as a backlash by hard-liners - who are against closer relations with the US - after the Iran nuclear deal was reached between US, five other world powers and Iran.