MUMBAI: Iqbal Kaskar , brother of underworld don Dawood Ibrahim , has been arrested on charges of extortion and assault following a complaint by an estate agent, police said on Tuesday.

An FIR was registered last night at Byculla police station after a complaint by Salim Shaikh, an estate agent that Kaskar and his men had demanded Rs 3 lakh after thrashing him last Friday, police said.

The alleged incident occurred in a room at Damarwala building at Pakmodia Street in south Mumbai's Bhendi Bazar area, police added.

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The case was subsequently transferred to JJ Marg police station as the place where the alleged extortion took place falls in its jurisdiction.

The 48-year-old victim, who is a resident of Byculla, first approached the local police station where the FIR was registered and then the matter was transferred to JJ Marg police.

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Kaskar had been deported to India from the United Arab Emirates in 2003.

Dawood's fifth sibling was wanted in a murder case and his alleged role in the controversial Sara Sahara case where a building came up illegally on government land but a court acquitted him in both the cases in 2007.