KATHMANDU: The Commission for the Investigation of Abuse of Authority (CIAA) on Tuesday rounded up three non-gazzetted officers and an office assistant of Land Revenue Office, Dillibazar while they were accepting Rs 500,000 bribe from service seekers at Dillibazar based Quality Fast Food. Those arrested are Mukunda Raj Pande, Ek Narayan Aryal and Post Raj Pokhrel and office assistant Lahari Kumal, said a press statement issued by the anti-graft body.