NEW : A restaurant worker injured in the shooting may be paralyzed , state media say . Investigators are hunting for the assassin of a reputed Usoyan mafia kingpin . Usoyan , also known as Aslan Usoyan , was shot at a restaurant , authorities say . Aslan Usoyan had been involved in the criminal underworld for his 70s , state media report .
NEW : A restaurant worker injured in the shooting may be paralyzed , state media say . Investigators are hunting for the assassin of a reputed Russian mafia kingpin . Aslan Usoyan , also known as Granddad Khassan , was shot at a restaurant , authorities say . Usoyan had been involved in the criminal underworld for decades , state media report .