Sean Kingston condition is upgraded to serious , his publicist says . Sanchez was also injured and hospitalized . The singer walked May 29 for the first time since the accident . Carozza and a woman were injured in a watercraft crash on Monday in the United States .
Sean Kingston condition is upgraded to serious , his publicist says . The singer walked May 29 for the first time since the accident . Carozza and a woman were injured in a watercraft crash on Monday in the United States .