( CNN ) -- The suspect in Norway 's July 22 terror attacks has told police he had plans to attack other targets , Norwegian police said Saturday . Anders Behring Breivik was interrogated Friday for the second time since his arrest , which followed the bombing of Oslo government buildings in which eight people died and a shooting rampage on an island which killed 69 . Police declined to say what the other targets were . They also offered no comment when asked about reports that Norway 's royal palace and the Labour Party headquarters were targets . The new details emerged during an interrogation of the suspect that lasted almost 10 hours , police attorney Pal-Frederick Hjort Kraby told reporters . Breivik was `` more than willing to co-operate '' with officers questioning him , and was calm and willing to explain himself , Kraby said . The first part of the interview focused on going back over what he had told police the first time he was questioned , a week ago , Kraby said . Then police questioned him about his movements in the government area of central Oslo before , during and after the bomb blast there , the attorney said . His answers will be checked against footage from video cameras in the area , Kraby added , as police seek to make sure he was not working with anyone else . Individuals who have been in contact with the suspect will also be of interest to police , the lawyer said . His mother has been formally interviewed . Breivik is expected to be interviewed many more times in the weeks ahead , with investigators likely to ask more questions rather than just letting him talk , Kraby said . Breivik is being kept in solitary confinement at Ila Prison , near Oslo , which held prisoners of the Nazis during World War II . His sole contacts are with his lawyer and prison staffers who take food to him . Breivik has admitted carrying out the bombing in Oslo , in which eight people died , and the shootings on Utoya , his lawyer and a judge have said . He has also pleaded not guilty in court . The attack on Utoya targeted members of the Labour Party 's youth movement as they attended a summer camp . On Friday , Norwegian authorities completed the identification of the dead , releasing the names of all 77 . Their ages ranged from 14 to 61 , with an average age of 21 . Earlier Friday , Prime Minister Jens Stoltenberg , other political leaders and relatives of the victims attended a memorial service organized by the Labour Party youth movement to commemorate those killed and wounded .
Breivik has told interrogators he planned to attack more targets . The new information emerged during a 10-hour interrogation session Friday . Police have not revealed the other potential targets named by Breivik . TL;DR Norwegian police say they are investigating whether Anders Behring Breivik, who killed 77 people in July 2011, was motivated by Islam or political ideology.