Mumbai, Apr 8 (IANS): The Central Bureau of Investigation (CBI) on Thursday questioned arrested Mumbai Police officer Sachin Vaze, former city Police Commissioner Param Bir Singh and two others in connection with the preliminary enquiry it registered for the probe into allegations of corruption against former state Home Minister Anil Deshmukh.

A CBI source related to probe told IANS: "The agency sleuths have recorded the statement of Vaze, who is presently in NIA custody."

The source said that the CBI is also recording the statement of Singh, who dropped a letter bomb on March 20, accusing Deshmukh of asking Vaze and other Mumbai Police personnel to extort Rs 100 crore 'monthly' from bars, hotels and restaurants.

Besides the two, the agency also recorded the statement of ACP Sanjay Patil and petitioner Jayshri Patil in connection its PE.

The CBI had registered a PE on Tuesday night. Two teams of CBI-led by SP level officer have arrived in Mumbai on Tuesday and Wednesday to probe the matter.

The Bombay High Court directed the CBI to conduct a preliminary probe against Deshmukh on Monday. Soon after the ruling, Deshmukh stepped down from his post.

The Supreme Court on Thursday dismissed the pleas of the state government and Deshmukh challenging the High Court order.

The NIA has arrested Vaze on March 13 after taking over the case of the explosive laden SUV found outside Reliance Industries chief Mukesh Ambani's residence. Vaze is also being probed in the mysterious death of businessman Mansukh Hiran.