Finland's Prime Minister Juha Sipila speaks to media after government's open session for members of public took place during the celebration of the 100th anniversary of Finnish independence in Porvoo, Finland May 4, 2017. REUTERS/Ints Kalnins 

Finland's Foreign Minister Timo Soini listens to media after government's open session for members of public took place during the celebration of the 100th anniversary of Finnish independence in Porvoo, Finland May 4, 2017. REUTERS/Ints Kalnins 

Finland's Foreign Minister Timo Soini listens to media after government's open session for members of public took place during the celebration of the 100th anniversary of Finnish independence in Porvoo, Finland May 4, 2017. REUTERS/Ints Kalnins 

Finland's Prime Minister Juha Sipila (L) listens to Foreign Minister Timo Soini after government's open session for members of public took place during the celebration of the 100th anniversary of Finnish independence in Porvoo, Finland May 4, 2017. REUTERS/Ints Kalnins 

Finland's Prime Minister Juha Sipila listens to media after government's open session for members of public took place during the celebration of the 100th anniversary of Finnish independence in Porvoo, Finland May 4, 2017. REUTERS/Ints Kalnins 

Finland's Prime Minister Juha Sipila (L) listens to Foreign Minister Timo Soini after government's open session for members of public took place during the celebration of the 100th anniversary of Finnish independence in Porvoo, Finland May 4, 2017. REUTERS/Ints Kalnins 

Finland's Finance minister Petteri Orpo, Prime Minister Juha Sipila and Foreign Minister Timo Soini (L-R) speak to media after government's open session for members of public took place during the celebration of the 100th anniversary of Finnish independence in Porvoo, Finland May 4, 2017. REUTERS/Ints Kalnins 

Finland's government holds an open session for members of public as part of the celebration of the 100th anniversary of Finnish independence in Porvoo, Finland May 4, 2017. REUTERS/Ints Kalnins 

Finland's Prime Minister Juha Sipila listens during government's open session for members of public as part of the celebration of the 100th anniversary of Finnish independence in Porvoo, Finland May 4, 2017. REUTERS/Ints Kalnins 

Finland's Prime Minister Juha Sipila listens during government's open session for members of public as part of the celebration of the 100th anniversary of Finnish independence in Porvoo, Finland May 4, 2017. REUTERS/Ints Kalnins 

Finland's government holds an open session for members of public as part of the celebration of the 100th anniversary of Finnish independence in Porvoo, Finland May 4, 2017. REUTERS/Ints Kalnins 

Finland's Foreign Minister Timo Soini listens to his Russia's counterpart Sergei Lavrov (not pictured) in Porvoo, Finland May 4, 2017. REUTERS/Ints Kalnins 

Russia's Foreign Minister Sergei Lavrov gestures before his meeting with Finland's Foreign Minister Timo Soini (not pictured) in Porvoo, Finland May 4, 2017. REUTERS/Ints Kalnins 

Russia's Foreign Minister Sergei Lavrov listens during his meeting with Finland's Foreign Minister Timo Soini (not pictured) in Porvoo, Finland May 4, 2017. REUTERS/Ints Kalnins 

Russia's Foreign Minister Sergei Lavrov listens during his meeting with Finland's Foreign Minister Timo Soini (not pictured) in Porvoo, Finland May 4, 2017. REUTERS/Ints Kalnins 

Finland's Foreign Minister Timo Soini (L) welcomes his Russia's counterpart Sergei Lavrov to their meeting in Porvoo, Finland May 4, 2017. REUTERS/Ints Kalnins 

Finland's Foreign Minister Timo Soini (L) welcomes his Russia's counterpart Sergei Lavrov to their meeting in Porvoo, Finland May 4, 2017. REUTERS/Ints Kalnins 

General view of Neste's oil refinery, with a total refining capacity of about 13.5 million tonnes per year, in Porvoo, southern Finland, November 17, 2015.REUTERS/Jussi Rosendahl/File Photo 

General view of Neste's oil refinery, with a total refining capacity of about 13.5 million tonnes per year, in Porvoo, southern Finland, November 17, 2015. Picture taken November 17, 2015. REUTERS/Jussi Rosendahl 

Finnish Formula One driver Mika Hakkinen and his bride Erja Honkanen kiss after their wedding ceremonies in the Porvoo Church June 13. 

Finnish Formula One driver Mika Hakkinen and his bride Erja Honkanen are showered in rice after their wedding ceremonies in the Porvoo Church June13. 

Assistant secretary-general of Nato's political affairs Klaus-Peter Klaiber (R) talks to Finnish Secretary of State Jukka Valtasaari at the Haikko mansion in Porvoo, 50km from Helsinki, April 27. The pair attended a Nato-sponsored meeting of the Euro-Atlantic Partnership Council. Sixty participants representing 30 countries are taking part in the two-day meeting which began Monday.

REUTERS