The step-mother of Anders Breivik said he was an apparently normal youth who showed no signs of what he was planning even in the months right before the massacre.
Tove Oevermo said she kept in touch with Breivik even after she and his father divorced when he was a teenager.
"He was just an ordinary Norwegian, a well-behaved boy. You can't put all of this together really. I saw no sign of him being a person like he must have been," she said. "It's really such a shock."
Ms Oevermo married Breivik's father, Jens, when he was four. Breivik would often visit her and his father in France.
"He felt like a happy, normal child," the retired career diplomat said. "We had a very good connection, and we liked being together, even when he was a small child. I got the impression she really liked me," she said.
Ms Oevermo and Breivik's father divorced 10 years later, around the time Breivik claims, in his 1,500-page manifesto, that he became estranged from his father. Ms Oevermo, 66, recalled the split, but declined to comment on what precipitated it. She did say, however, that she got the feeling Breivik wanted to have a relationship with his father, though he never spoke of their relationship.
After her divorce, Breivik kept in touch with Ms Oevermo via an occasional email, but she did not see him very often, she said.
She said she saw him last in March or April of this year when he visited her at her home south of Oslo. He was living with his mother in Oslo at the time and stopped by to pay her a friendly house call.
She said Breivik didn't seem agitated during the visit and behaved normally. He left saying "'see you again soon' or something like that, something very normal," she said.
As for the attack itself, she said she was horrified. "People say, 'I'm shocked.' They don't know what shock is all about, physically and psychologically. It was so unreal. I couldn't believe it. I refused to believe it," she said. "If I'd had some kind of suspicion - some kind of idea that something was not right with him, it would have been easier, I think."