NEW : A restaurant patron injured in the shooting may be paralyzed , state media say . Police are hunting for the assassin of a reputed Russian mafia kingpin . Involved in the criminal underworld since the 1960s , Usoyan had survived at least two previous attempts on his life , one in 1998 and the other in 2010 , state-run RIA Novosti reported . Sergei Usoyan , also known as Granddad Khassan , was shot at a restaurant , authorities say . He had been involved in the criminal underworld for years , state media report .
NEW : A restaurant patron injured in the shooting may be paralyzed , state media say . Police are hunting for the assassin of a reputed Russian mafia kingpin . Sergei Usoyan , also known as Granddad Khassan , was shot at a restaurant , authorities say . He had been involved in the criminal underworld for years , state media report .