Chennai: Shipping ministry official K Sakthi was arrested for demanding a bribe of Rs 25,000, the Central Bureau of Investigation (CBI) said Wednesday. In a statement issued here, the CBI said Sakthi, posted as deputy director in directorate of lighthouses and lightships here, had demanded Rs.25,000 as bribe from a contractor for releasing his dues and also sanction additional work. On a complaint by the contractor, a trap was laid Tuesday and Sakthi was caught while accepting the bribe and remanded to custody.