A special Central Bureau of Investigation court in Mumbai has issued judicial requests to Singapore, Hong Kong and the United States in the Sheena Bora murder case seeking details of financial transactions done by main accused Indrani Mukerjea and her husband Peter.

CBI sources said the Letters Rogatory will be sent through diplomatic channels to judicial authorities of Singapore, Hong Kong and the US with a request to provide desired information.

The agency which has named in the charge sheet Sheena's mother Indrani, her ex husband Sanjeev Khanna and driver Shyamvar Rai for allegedly murdering her has now focused its attention on money as possible motive behind the killing.

24-year-old Bora, Indrani's daughter from her first marriage, was allegedly murdered in April 2012. Peter was also arrested in the case.

Earlier, the agency had told the court that it has sought Interpol's help for access to overseas bank accounts of the Mukerjeas.

The CBI had claimed that investments of crores of rupees were allegedly made by the Mukerjea couple and that 'Indrani and Peter had formed various companies during 2006 07 and invested Rs 900 crore in them'.