OSLO, Norway (AP) — Police have announced they had dramatically overcounted the number of people slain in a shooting spree at a political youth group's island retreat and were lowering the confirmed death toll from 86 to 68.The overall toll in the attack now stands at 76 instead of 93 — still one of the worst modern mass murders in peacetime.Police spokesman Oystein Maeland said the higher, erroneous figure emerged as police and rescuers were focusing on helping survivors and securing the area, but he did not immediately explain more about how the overcounting occurred.Police also raised the toll from a bombing outside the government's headquarters in Oslo before the shooting spree, from seven to eight.Anders Behring Breivik has confessed to both assaults but denied criminal responsibility for them and pleaded not guilty at his first hearing Monday. He told the court he wanted to save Europe from Muslim immigration and warned there are two other cells of his terror network.The court ordered him held for eight weeks while prosecutors investigate, four of which will be in isolation, saying Breivik could tamper with evidence if released. Typically, the accused is brought to court every four weeks while prosecutors prepare their case, so a judge can approve his continued detention.