A Friday report by the United Nations says Iran is using advanced technology, including drones, facial recognition and a citizen-reporting app to crack down on violations of its mandatory hijab laws.

The report highlights Iran’s escalating reliance on technology to monitor and punish women defying the mandatory dress code. Central to this crackdown is the “Nazer” mobile application, a government-backed tool that allows citizens and police to report women for alleged violations.

A U.N. fact-finding mission into Iran's treatment of women reported that the Islamic republic was resorting to extreme measures in its drive to restrict their rights, including electronic surveillance and camera-drones.