150 angry workers gathered on Saturday Jan. 10th in front of the Parliament in Tehran to protest the new bill distributed in the parliament on Labor Law
The demonstration which was pre-planned and pre-organized condemned the new labor law submitted by the president. Protesters were carrying signs with slogans against Rouhani. 
The police and intelligence agents tried to scare off 2 protesting workers who were handing a load speaker, and trying to stop them from encouraging workers, but were confronted by protesting workers. They had no choice other than to back down and surrender to the will and protest of the angry workers out of fear of wider spread demonstration.
Then the agents went to reporters to prevent those from taking pictures or filming the event which eventually led to clash between the state security guards and reporters.
It should be noted that the law that workers were condemning and protesting against was approved by the members of parliament today. This law reduces the job security of workers to only one day.