Those detained took part in the rally, which was not approved by the authorities, the Mehr news agency reported, citing the authorities.
On Thursday, thousands of Iranians in several cities across the country took to the streets to protest against unemployment, poverty, and the rising cost of living, as well as policies of President Hassan Rouhani, and Supreme Leader Ali Khamenei.
Breaking news-Thousands protest in Mashhad (second most populous city located in northeast #Iran), and other cities today, chanting “death to Rouhani”, “death to dictator” “forget about Syria, think about us.” They were protesting the rise in the living costs. pic.twitter.com/wprzRzZb3c— Shahin Gobadi (@gobadi) December 28, 2017
In Mashhad, the Iranian security forces used tear gas against the demonstrators, according to media reports.
#BREAKING: Iranian Police begins using teargas to disperse anti-Rouhani demonstration in the city of #Mashhad; Thousands of protesters chanting “death to Rouhani”, “death to dictator” “forget about Syria, think about us" pic.twitter.com/O3ZK0zyJ0E— Amichai Stein (@AmichaiStein1) December 28, 2017
The unemployment rate in Iran stands at 12.7 percent, according to the World Bank data.