Yusuf Memon, one of the convicts of the 1993 Mumbai serial blasts, died of heart attack at the Nashik Central Jail on June 26, reports wionews.com. The younger brother of absconding mastermind Tiger Memon, Yusuf was convicted for the terror attack and was serving a life sentence. Among other things, Yusuf was found guilty of allowing the use of his premises in Mumbai for terror activities to Tiger Memon, who masterminded the attacks along with Dawood Ibrahim Kaskar and others.