CCTV footage captured the armed gunmen moving through the complex with military precision, looking for victims. They then went from office to office shooting randomly.
In panic, people took cover wherever they could — behind cars, in offices or inside bathrooms. Robert Murire said it was chaos.
"When those guys came in, they just started shooting. They were not normal people. Just they were three people. They had green trousers, green tops, they had something here and bullets, black bullets," he said.