This the report from the first people arriving:
the demonstrators were being kept inside the box created by trucks with fences and put into panic by using gas inside the confinement area to take people out to be arrested. After that people was take out from the area and striped and kept 2-3 hours sitting on the street. Then 5 at a time people have been taken by car to grønland police station. The police then proceeded to collect the ids of all the demonstrators and released them.