FTimes - STT Report, Dec. 08
The protesters smeared the Metro, broke windows and caused damage to cars parked in the city centre.
The Helsinki police said, 13 people are suspected of crimes related mostly to vandalism.
Some are also suspected of rioting and subordination, as they failed to obey police orders to disperse from Eteläranta where the protesters gathered.
But the suspects who have been interrogated denied taking part in the alleged crimes, said Chief Inspector Kari Martikainen.
A total of 30 people were taken to custody but all of them were freed by early Sunday evening.