A man arranges flowers next to a graffitti marking a bomb attack last Friday, in the centre of Oslo July 28, 2011. Norwegian police on Thursday ended a six-day search for bodies on the island where anti-Islamist extremist Anders Behring Breivik killed 68 people and say they are increasingly certain he acted alone. Breivik, 32, killed a total of 76 people in a bomb attack in central Oslo followed by the shooting rampage at the island summer camp for the ruling Labour Party's youth wing. REUTERS