KATHMANDU: The Commission for the Investigation of Abuse of Authority (CIAA) has arrested a government official for taking bribe of Rs 22,000 from his client. The CIAA team acting on a complaint by clients held Saroj Rokka, non-gazetted first class officer, who is posted at the National Public Health Laboratory, Teku. Investigations are ongoing, said the CIAA's spokesperson Pradip Kumar Koirala, adding that a case against Rokka has been filed at the Special Court.