The Central Bureau of Investigation official told IANS that Karti left for Mumbai at 8 am, in an Air India flight.
Karti allegedly received Rs 35 million (Rs 3.5 crore) from the Mumbai-based INX Media, now known as 9X Media, for helping it get Foreign Investment Promotion Board (FIPB) clearance in 2007 when it was run by Peter and Indrani Mukerjea, both accused in the Sheena Bora murder case.
Indrani Mukerjea, an accused in the case, had told a magistrate that Karti had met her in a Delhi hotel and demanded $1 million in bribe for the FIPB clearance.
According to officials, he would be confronted with the Mukerjeas, who are currently lodged in a Mumbai jail.
He was arrested on Wednesday from the Chennai airport soon after he landed from London.