'Ruthless' mass shooting left 'blood trail' on streets as restaurant owner aided victimsA boy of 14 has been held on suspicion of attempted murder after the gun horror, described by Sweden's Minister of Justice Gunnar Strömmer as "extremely ruthless"View 5 Images Six people were injured in the gun horror (Image: Ali Lorestani)Hero restaurant workers rushed to the help of victims of a "ruthless" mass shooting that left six people injured. Cops swarmed the scene in Gävle, Sweden, after gunfire rang out in a street lined with bars and restaurants. ‌A boy of 14 has been held on suspicion of attempted murder after the gun horror, described by Sweden's Minister of Justice Gunnar Strömmer as "extremely ruthless". View 5 Images A huge police presence at the scene (Image: X)Cops were called at around 2am on Saturday morning to reports of gunfire. Article continues belowView 5 Images The gun horror has left locals reeling (Image: Getty Images)He said: "This is not exactly the first time.