Former Mumbai Police Commissioner Param Bir Singh on Thursday filed a public interest litigation in the Bombay High Court seeking an "immediate and unbiased" probe against Maharashtra Home Minister Anil Deshmukh, who he claimed asked police officer Sachin Waze to collect Rs 100 crore from bars and restaurants.

The IPS officer had earlier this week approached the Supreme Court, which on Wednesday termed as quite serious the matter in which he had filed a plea against Deshmukh, but asked him to approach the Bombay High Court with his grievances.