Prabhakar Sail, the independent witness in the cruise drugs case, arrived at the Mumbai police commissioner's office on Monday to meet senior security officials, a day after he claimed that Rs 25 crore was demanded by an NCB official and other persons to let off Bollywood superstar Shah Rukh Khan's son Aryan Khan in the case, an official said.

Sail visited the police commissioner's office apparently in connection with his security concern, an official said.