Norwegian Hussan Abdi Dhuhulow identified as one of Westgate terrorists (VIDEO)

One of the suspects in the Westgate mall attack in Nairobi, Kenya, has been identified as a 23-year-old Norwegian citizen.

Police believe that a man shown on CCTV footage of the September attack is Somali-born Hussan Abdi Dhuhulow, sources told the BBC.

The four-day assault on the mall, in which at least 67 people died, has been claimed by members of the Al Qaeda-linked Al Shabaab, an Islamist militant group based in Somalia.

The group claims the killing of civilians at the upscale shopping center was revenge for Kenyan incursions into Somalia to root out militants.

More from GlobalPost: Kenya Westgate investigations, a month after attack

With his family, Dhuhulow fled Somalia for Norway as a refugee in 1999 during fighting in his home country.

He returned to Mogadishu a decade later and has had only sporadic contact with his family since then, according to the BBC.

Relatives told the BBC's 'Newsnight' program that Dhuhulow called home infrequently, but once indicated that he was in trouble and needed to return to Norway quickly.

Last week Norwegian intelligence agency PST said that it had sent officers to Kenya to investigate suspicions that a Norwegian national was involved, Agence France-Presse reported.

It is still unclear how many militants were involved in the attack.

Kenyan police have said that "10 to 15" could have been involved, but the CCTV footage released so far shows only four men.

More human remains have been pulled from the wreckage of the mall, which partially collapsed in a fire during the operation to defeat the attackers. Officials told the Associated Press that two boxes of body parts had been taken to a morgue, where they would be DNA tested.

The remains are expected to be identified as belonging to militants, since they were found near AK-47 rifles of the type used in the attack, sources told the AP.

Surveillance footage shows the assailants who shooting down shoppers as they scramble for their lives. The men are seen using their phones and even stopping to pray during the attack.