It was at 01:30 in the night towards Sunday that the police were alerted to the square by the fountain in Vänersborg, where some 20 people ended up in trouble.

Several people were injured and one car was smashed.

"There were belts, knives and knuckles in place, but no one has had any serious injuries that we have come to know," says Thomas Fuxborg, police spokesman in the West region.

The police have prepared four reports of abuse and one complaint of car damage.

- We do not know who is guilty and who is victim yet, says Thomas Fuxborg.