Iqbal Kaskar was deported to India from the United Arab Emirates in 2003.

Highlights Case filed following complaint by Mumbai-based builder

Kaskar was deported to India from UAE in 2003

Kaskar's brother Dawood Ibrahim was mastermind of 1993 Mumbai blasts

Underworld don Dawood Ibrahim's brother Iqbal Kaskar has been arrested in Mumbai in connection with a case of extortion. The arrest was made by Pradeep Sharma, a former encounter specialist who heads the Anti-Extortion cell of the Thane Police. The case was filed following the complaint of a Mumbai-based builder.Sources said the builder had alleged that Iqbal Kaskar had made repeated demands for flats even after receiving four flats in Mumbai.The arrest led to speculations about possible action against India's most wanted criminal Dawood Ibrahim. Last week, Union minister VK Singh had said "We will not talk about Dawood at all. Certain things are happening. We can't let the cat out of the bag."In 2003, Iqbal Kaskar was deported to India from the United Arab Emirates. He was reportedly wanted in a murder case, as well as his alleged role in the controversial Sara Sahara case, where a building came up illegally on government land. Four years later, a court acquitted him in both cases.Dawood - the elder brother of Iqbal Kaskar -- is the mastermind of the 1993 Mumbai serial blasts in which 257 people were killed. He has been listed as a global terrorist by a committee of the UN Security Council.

Last year, the UN agency added his addresses in Karachi on its list, validating India's stand that the man is being shielded by Pakistan.Recently, UK placed him on its updated list of Financial Sanctions Targets, where he is mentioned as the only "Indian national". The list contains his 21 aliases and three recorded addresses in Pakistan's Karachi.