Hassan Abdi Dhuhulow, 23, is a Norwegian citizen of Somali origin and he is suspected of helping to plan and carry out the attack.
At least 67 people died in the attack in Nairobi, which the al-Qaeda linked group al-Shabab says it carried out.
Last week Norway’s intelligence agency, the PST, said it had sent officers to Kenya to verify reports that a Norwegian citizen had been involved in the assault on the shopping centre, which began on Saturday September 21 and lasted four days.
It is unclear how many militants were involved. Police had initially estimated that there were 10-15 attackers inside the complex, but the CCTV footage which has so far been released by the Kenyan authorities shows just four men.
Hassan Abdi Dhuhulow is believed to be one of those four.
Forensic investigators are still combing through the rubble of Westgate – no bodies have yet been identified and it is not known whether the attackers are alive or dead.
Hassan Abdi Dhuhulow was born in Somalia, but he and his family moved to Norway as refugees in 1999.
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