The Central Bureau of Investigation on Saturday filed a supplementary charge sheet against 15 accused, including alleged middleman Christian Michel and accused-turned-approver Rajiv Saxena, in connection with the alleged corruption in the Rs 3,600 crore AgustaWestland VVIP chopper deal.

The charge sheet filed before Special Judge Arvind Kumar in Delhi's Rouse Avenue Court, does not name former Defence Secretary Shashi Kant Sharma, according to the sources. On September 11, the probe agency had sought sanctions to prosecute him.