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Finnish police patrols in front of the Cenral Railway Station in Helsinki, on August 18, 2017. Several people were stabbed in the southwestern Finnish city of Turku on Friday, police said after shooting and arresting a suspect. / AFP PHOTO / Lehtikuva / Linda Manner / Finland OUT (Photo credit should read LINDA MANNER/AFP/Getty Images)

Finnish police patrols in front of the Cenral Railway Station in Helsinki, on August 18, 2017.
Several people were stabbed in the southwestern Finnish city of Turku on Friday, police said after shooting and arresting a suspect.
 / AFP PHOTO / Lehtikuva / Linda Manner / Finland OUT        (Photo credit should read LINDA MANNER/AFP/Getty Images)

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The President of Finland Sauli Niinistö attends a press conferance in Helsinki, Finland, on November 6, 2017 after meeting with US Secretary of Defense James Mattis (unseen). / AFP PHOTO / Lehtikuva / Heikki Saukkomaa / Finland OUT (Photo credit should read HEIKKI SAUKKOMAA/AFP/Getty Images)

The President of Finland Sauli Niinistö attends a press conferance in Helsinki, Finland, on November 6, 2017 after meeting with US Secretary of Defense James Mattis (unseen). / AFP PHOTO / Lehtikuva / Heikki Saukkomaa / Finland OUT        (Photo credit should read HEIKKI SAUKKOMAA/AFP/Getty Images)

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A picture taken on April 18, 2011 shows a selection of Finland newspapers' front pages a day after Finland's parliamentary elections. Finland's media said the country had undergone a "revolution" after the ruling Centre Party government was toppled in polls which saw a dramatic surge in support for right-wing nationalists. "Who would have guessed last spring that Finland's parliamentary elections would be a strange kind of referendum on the European Union and the euro? This is ultimately what happened," political analyst Unto Haemaelaeinen wrote in the country's leading Helsingin Sanomat daily. AFP PHOTO / JONATHAN NACKSTRAND (Photo credit should read JONATHAN NACKSTRAND/AFP/Getty Images)

A picture taken on April 18, 2011 shows a selection of Finland newspapers' front pages a day after Finland's parliamentary elections. Finland's media said the country had undergone a "revolution" after the ruling Centre Party government was toppled in polls which saw a dramatic surge in support for right-wing nationalists. "Who would have guessed last spring that Finland's parliamentary elections would be a strange kind of referendum on the European Union and the euro? This is ultimately what happened," political analyst Unto Haemaelaeinen wrote in the country's leading Helsingin Sanomat daily. AFP PHOTO / JONATHAN NACKSTRAND (Photo credit should read JONATHAN NACKSTRAND/AFP/Getty Images)

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Police officers investigate the area where three women were killed in a restaurant in Imatra, Eastern Finland on December 4, 2016. A gunman shot dead three women, including a local council official, as they were leaving a restaurant in a small Finnish town on Saturday night, police said. / AFP / Lehtikuva / Hannu RISSANEN / Finland OUT (Photo credit should read HANNU RISSANEN/AFP/Getty Images)

Police officers investigate the area where three women were killed in a restaurant in Imatra, Eastern Finland on December 4, 2016.
A gunman shot dead three women, including a local council official, as they were leaving a restaurant in a small Finnish town on Saturday night, police said. / AFP / Lehtikuva / Hannu RISSANEN / Finland OUT        (Photo credit should read HANNU RISSANEN/AFP/Getty Images)

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Finnish police gather near buildings where three men were shot and killed in an apartment in the central town of Jyvaeskylae on January 8, 2009. The gunman was also among the dead. Police surrounded the apartment building in the Pupuhuhta district of the town after being alerted of gunfire. All of the victims were adults. At least one woman and a child were in the flat at the time of the shooting. AFP PHOTO / JUHA SORRI - FINLAND OUT - (Photo credit should read JUHA SORRI/AFP via Getty Images)

Finnish police gather near buildings where three men were shot and killed in an apartment in the central town of Jyvaeskylae on January 8, 2009. The gunman was also among the dead. Police surrounded the apartment building in the Pupuhuhta district of the town after being alerted of gunfire. All of the victims were adults. At least one woman and a child were in the flat at the time of the shooting. AFP PHOTO / JUHA SORRI - FINLAND OUT - (Photo credit should read JUHA SORRI/AFP via Getty Images)