The CBI today filed its first charge sheet in a Delhi court against sacked CWG Organising Committee chairman Suresh Kalmadi, describing him as a "main accused" in a corruption case relating to irregularities in awarding a games-related contract to a Swiss firm.

The probe agency, in its over 50-page charge sheet, has accused Kalmadi as the key person with all the powers to take decisions regarding award of contracts.