Rutger Gunnarsson, Swedish bassist who played with and arranged for the group ABBA, has died in Stockholm at age 69. Here's a link to a more detailed obit:
http://www.notreble.com/buzz/2015/05/09/in-memoriam-rutger-gunnarsson/
http://www.notreble.com/buzz/2015/05/09/in-memoriam-rutger-gunnarsson/