As reported by local media:

"4 masked persons rushed in and destroyed or partly destroyed art to an estimated value of 150,000 swedish crowns (20000$ dollars). An employe who tried to intervine got punched in the face. The 4 then left the gallery running."

Example of Edemonts "art" using dismembered animals:
WARNING: THESE PICTURES ARE GRAPHIC IN NATURE
#1
#2
#3