Two helicopters collided and crashed in Eura, southwest Finland, shortly after midday on Saturday.
Axar.az reports according to ERR, the Estonian Ministry of Foreign Affairs has confirmed that all individuals on board the helicopters have died.
Police said a total of five people were on board the two helicopters, two in one and three in the other. Rescue workers located the helicopters in a forested area, approximately 100 metres apart from each other.
The helicopters were flying from Tallinn, Estonia, to Piikajärvi Airfield in Kokemäki at the time of the accident. Estonian news outlet Postimees reported that the passengers were Estonian businessmen.
The National Bureau of Investigation (NBI) is leading the preliminary investigation.
According to Ari Pullinen, chairman of the Pori Aviation Club, the individuals aboard the helicopters were headed to the Piikajärvi Airfield for a hobby event.
The event was intended to be a day-long gathering, set to conclude on Sunday. Organisers expected around 20 aircraft and approximately 50 participants.