The office was left trashed with paper strewn everywhere and drawers emptied onto the floor.
Taskforce Sweep's chairman Sam Koim says staff are still trying to establish what has been stolen.
He says some laptops and investigation files are gone but the break-in will not deter his officers.
"This is not going to discourage us. No-one will intimidate us," he said.
Taskforce Sweep's investigations have led to the arrests of dozens of politicians, bureaucrats and businessmen over the past 18 months.