Two police cruisers were sent from Sundsvall to investigate. However, after a stop and search, there was a natural explanation for the masks.
In the cars were a number of berry pickers who had covered their faces to protect themselves against mosquitoes.
"There was no reason to distrust them even if we do not have so many mosquitoes now. It is not uncommon for berry pickers to wear masks to avoid mosquitoes," says Markus Holmberg, duty officer at the police in Västernorrland to TT.