Houston police say a dispute over one dancer bumping another led to gunfire that left three men dead and three women wounded.
Police on Tuesday appealed to the public to provide information in the search for the gunman.
Police say the incident began early Sunday inside Club ICU then moved to the parking lot where a fight broke out.
Police spokesman John Cannon says the initial dispute was over one woman bumping the other while both were on the dance floor.
Police identified the three men who died as 38-year-old Gilbert Kibble, 22-year-old Curtis Stewart and 26-year-old Felipe Castillo. Names of the three women who were wounded haven't been released.
Cannon says police are trying to determine whether the two women who originally argued were among the three injured females.