There are conflicting reports on a British man held in Kenya for questioning . Complexity of attack raises questions about planning , possible collusion . Official : Al-Shabaab previously had said Americans were involved in the attack , a claim Kenyatta also noted Tuesday but said has not been verified . The Westgate Mall attackers `` were not interested in hostage-taking '' they wanted to kill as many people and take over the mall as quickly as possible.'
There are conflicting reports on a British man held in Kenya for questioning . Complexity of attack raises questions about planning , possible collusion . Official : The Westgate Mall attackers `` were not interested in hostage-taking '' they wanted to kill as many people and take over the mall as quickly as possible.'