NEW : Police say first attacker was female , other attacks were random , CNN affiliate says . Officers responded at 2:03 p.m. to the first shooting , which left 31-year-old Aaron Anderson in critical condition , police said . Three people are dead and two are critically injured . Police release names of four victims . Four attacks occur within an hour in south Omaha , police say .
NEW : Police say first attacker was female , other attacks were random , CNN affiliate says . Three people are dead and two are critically injured . Police release names of four victims . Four attacks occur within an hour in south Omaha , police say .