Kaskar was already in judicial remand after the Thane police's anti-extortion cell arrested him last year in connection with two cases.
Thane Police Commissioner Param Bir Singh today said that Kaskar was yesterday produced in a sessions court in connection with another extortion case.
The court remanded him in police custody till March 6, he said.
The Thane city police had earlier slapped charges under the stringent anti-organised crime law MCOCA (Maharashtra Control of Organised Crime Act) against Kaskar and others in the various cases.
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A case was then filed under IPC sections 384 (punishment for extortion), 386 (extortion by putting a person in fear of death or grievous hurt) and 34 (acts done by several persons in furtherance of common intention) at the Kasarvadavali police station.
On September 18, Kaskar was held along with accomplices Mumtaz Shaikh and Israr Sayyed, for extorting four flats and Rs 30 lakh from a builder in Maharashtra.
The third case in which he was yesterday remanded in police custody pertained to allegedly extorting Rs 3 crore from a prominent builder in North Mumbai.
Following the builder's complaint, the police had registered the case against Kaskar and his gang members in October last year.
Kaskar, who was deported from the United Arab Emirates in 2003, is said to be operating his brother's real estate business in Mumbai.
He is presently lodged in the Thane District Central Jail.