CHANDIGARH: The Punjab Vigilance Bureau (VB) during its ongoing campaign against corruption in the state, has registered a disproportionate assets case against Rakesh Kumar Singla, former Deputy Director, Food and Civil Supplies Department, Punjab along with his wife Rachna Singla for creating wealth than his known sources of income. Besides this, process has been initiated by the VB to issue red corner notice against the absconding Singla and a letter has been sent to CBI and Interpol New Delhi in this regard.