"One of the reasons for concern is that the attacks appear to be copied, which is why we need to be prepared in Finland," Finland's police chief Mikko Paatero told YLE.
Terrorism is a cause of concern for Finnish police, as there is a threat that attacks that took place in France and Denmark could be repeated in Finland, Paatero said.
On Saturday, two gunmen opened fire at a debate on free speech in a cafe in Krudttonden, Copenhagen. The attack left one person dead and three injured after about 40 shots were fired. On Sunday, the police confirmed that a person was shot in the head by an unidentified gunman in a synagogue in the Danish capital. The other two victims of shooting were wounded in their arms and legs.