India, Feb. 5 -- The Supreme Court on Wednesday came down heavily on the Central Bureau of Investigation (CBI) and the Enforcement Directorate (ED) for their delay in probing allegations of a massive bank fraud involving Reliance Communications and its former promoter Anil Ambani.

It asked the agencies and the Centre to take all preventive steps to ensure that Ambani does not leave the country as the court fast-tracks and monitors the investigation. Ambani, on his part, undertook not to leave India without the court's nod and also offered to settle all dues on a consolidated basis following an independent assessment.

A bench, headed by Chief Justice of India Surya Kant, emphasised that the nature and scale of the alleged offences warran...