Iran’s Interior Minister has warned security officials will step up action against protesters taking to the streets over a new petrol policy.
Protests have erupted across Iran after the government unexpectedly announced it was rationing petrol and increasing its price.
At least one person has been killed and others injured in the violence.
Officials say the changes, which have seen prices rise by at least 50%, will free up money to help the poor.
Iran is already suffering economically due to stiff sanctions imposed by the US after Washington decided to pull out of the 2015 Iran nuclear deal.
Protests erupted hours after the new policies were announced on Friday – with fresh demonstrations on Saturday in some cities.
There are also reports that access to the internet may have been restricted, Reuters reported citing a web monitoring group.
Interior Minister Abdolreza Rahmani-Fazli, speaking during an interview with state television on Saturday, warned that law enforcement and security officials will have “no choice” but to step in and restore calm if “illegal” actions continue.
Mr Rahmani-Fazli criticised a “limited number” of people whom he accused of abusing the public mood to create “intimidation and terror”.