Investigators are questioning relatives and friends of Hassan Abdi Dhuhulow, a Norwegian who was born in Somalia and grew up in Larvik, to determine if he was one of the four militants seen on surveillance tape inside the Westgate Mall during the four-day siege that began Sept. 21, The New York Times reported Friday.
Dhuhulow's sister told the Times Norwegian security police officials asked her if her brother made calls from Nairobi, including from the Westgate shopping mall, during the siege. She said she told investigators he hadn't.
"My mother and father and me, we don't even know if he is dead or alive," she said. "We are waiting for the whole issue to become clearer."
The Norwegian Police Security Service said it received information a Norwegian citizen of Somali origin may have been involved in "the planning and execution of the attack" when militants stormed the mall and killed at least 67 people, including several soldiers. Large parts of the shopping center were destroyed.
Kenyan President Uhuru Kenyatta said five terrorists were killed and 11 suspects were in custody.
The Somali militant group al-Shabaab claimed responsibility. Kenyan officials at first said 10 to 15 people were involved in the assault but now say the number of assailants was likely four to six.
Several charred bodies were recovered from the mall rubble Thursday, including two that are "highly likely" to be those of two attackers, a Kenyan lawmaker told the BBC.
Ndung'u Gethenji, chairman of the committee investigating the attack, said AK-47 rifles used by the militants were found next to the bodies. He said the Kenyan army doesn't use AK-47s.
He said another body recovered from the rubble was likely a soldier.
Video footage from inside the tony Westgate Mall obtained by CNN offered a silent record of events during the four-day siege.
The footage showed gunmen taking turns to pray during the attack and talking on cellphones while shooting at shoppers and employees.
The footage also shows two attackers opening fire in the mall's parking lot, sending shoppers diving for cover, CNN said.
The footage inside the mall concentrated on an area closest to a supermarket, an anchor of the multistory shopping center.
Texas principal bans speaking Spanish, stirs controversy
Florida bear attack: Black bear mauls woman's face