A new demonstration broke out on Monday evening in central Tehran, with pictures of burned cars on local media amid reports of heavy police deployment on the street.

The conservative Fars news agency published a picture of a burned-out car, while social media reports said relatively small groups of protesters had chanted anti-regime slogans in the center of the Iranian capital.

Mehr news agency reported that “a rioter set fire to a car and fled immediately.”

“The identity of the elements that were causing the unrest has been identified and a number of them have been arrested, and the others are prosecuted and will soon be dealt with strongly,” the ministry said in a statement.

On Monday, the fifth day of unrest in Iran, which erupted in the city of Mashhad on Thursday to protest the economic conditions suffocating before moving to other cities and turn into protests against the Iranian Islamic regime.

Since then, 12 people have been killed in clashes with security forces across the country.