The minister has asked police for an explanation of the circumstances of why they used force on Saturday at a pro-Kurdish, anti-Turkey march and rally.
During the event one person was zapped with a taser, while officers smashed a car window to gain access and stop it leading the march.
Helsinki Police say there was extra security measures in place, including mounted police on horseback, because a previous demonstration had resulted in vandalism to the Turkish embassy, and because they had reason to believe the marchers would not stick to the approved, agreed route.
In a statement, Helsinki Police say protest organisers tried to put a car with loudspeakers at the front of their march against police instructions. Protesters who tried to block police were tased.
Two-term Finns Party MP Tom Packalén, himself a former senior Helsinki Police officer, writes in his party’s online newspaper that while protesters have a right to protest, it is the job of the police to ensure public safety and order.
And he criticised Maria Ohisalo for tweeting that she would ask for a full report from Helsinki Police about what happened on Saturday.
“In my opinion, such a populist tweet is unworthy of the Interior Minister. It gives the impression of flirting with anarchy” writes Packalén.