The posters pinned on the window of the opposition party Perussuomalaiset (Finns Party) election office located in Vallila district of Helsinki were vandalised during the early hours of Monday.
The chair of the Finns Party Helsinki chapter Nuutti Hyttinen said it was the fourth or fifth time the election office was vandalised.
According to Hyttinen, the vandalism did not result to significant loss since the posters were replaced.
The decision to report the incident to the police had not yet been made, said Hyttinen.
The perpetrators informed about their action on the website Takku.net.
The Finns Party election office has been subject in the past, most recently in December and January last year. The window of the building had also been broken in the past.
