The trial of four men charged over the Westgate shopping centre siege in Kenya has started in the capital, Nairobi.
They deny charges of aiding a “terrorist group” and being in Kenya illegally.
The court heard testimony from a guard who was outside the centre when the gunmen launched the attack in September, killing at least 67 people.
Somalia’s al-Qaeda-linked al-Shabab group said one of its suicide brigades carried out the siege.
The four are the first to be charged over the attack – the worst in Kenya since 224 people were killed in the 1998 bombing of the US embassy.
None of the men – named as Mohammed Ahmed Abdi, Liban Abdullah, Adnan Ibrahim and Hussein Hassan – are accused of being the gunmen who carried out the attack.
Their nationalities have not been disclosed, but they are said to be ethnic Somalis.
Guard Stephen Juma told the court he was directing traffic outside the upmarket shopping centre when a car pulled up and three men jumped out, the AFP news agency reports.
He did not see their faces, but heard gunshots, Mr Juma added.