Red flags with the PKK's symbol hang on three flagpoles at Stenpiren in Gothenburg. The flag is a symbol of the PKK, a terrorist organization that has been waging war against the Turkish state since the eighties.
That Sweden should extradite people with links to the PKK is one of Turkey's demands for allowing Sweden to join NATO. Who is responsible for the flag poles is not yet known, but they should have been hoisted as early as Monday.