The state-owned mining firm Terrafame, which took over the bankrupt and accident-prone Talvivaara mine in Sotkamo, says it faces a police probe over excess discharges of waste water.
The nickel mine exceeded permitted levels of waste water in April of 2016 and December 2015. The company says that the discharges were necessary to ensure the safety of its dams and prevent more serious damage to the environment.
Talvivaara handed over the mine to the state-owned successor in August of last year. The previous firm went bankrupt after a string of environmental mishaps and problems with its method for extracting nickel.