<span style="color: #222222;">The Mumbai Police has arrested underworld don Dawood Ibrahim's nephew Rizwan Kaskar in connection with an extortion case.<br />'' <br />'' According to a police official, Rizwan Kaskar, the son of Ibrahim's brother Iqbal Kaskar, was arrested yesterday night from the Mumbai international airport when he was trying to escape the country.<br />'' <br />'' Two days ago, Mumbai Police's anti-extortion cell arrested Ahmed Raza Wadharia, a close aide of Ibrahim's gang member Fahim Machmach, in an extortion case.<br />'' <br />'' During Raza's interrogation, Rizwan Kaskar's name cropped up. Based on the information, a trap was laid and he was detained at the Mumbai international airport on Wednesday night when he was trying to escape from the country.</span><br />