New Delhi, Oct 16: Terming the rape incident of a Swiss diplomat here as "shocking and shameful", Deputy Prime Minister L K Advani today directed the authorities to bring the guilty to book and take steps to prevent recurrence of such incidents. Advani spoke to Delhi Lt Governor Vijai Kapoor and Police Commissioner R S Gupta and told them that the culprits should be brought to book at the earliest, sources in the DPM's office said. The DPM said that the culprits should not go unpunished and steps should be taken so that such incidents did not recur in future, the sources added. Bureau Report