During the night until Monday, about 30 boats were vandalized in the marina at Brynäs in Gävle.
The boat owners discovered that they had been greeted and the canopy had been torn apart, locks had been broken, petrol had been stolen and at least one boat had been stolen.
The police have reviewed videos from camera surveillance.
- It is about several young boys that we have managed to identify. This has been done both with the help of camera surveillance and in other ways. It's sad that this kind of thing is going to happen. In some cases, this can now be a matter for the social services, says Mikael Hedström, press spokesperson for the police.