Ten alleged gang members were convicted in the killings of 12 women, some of the hundreds who have been found slain in this border city in recent years. Four bus drivers, all thought to be loyal to a criminal gang known as "Los Toltecas," were sentenced Thursday to between 40 and 113 years in prison for premeditated homicide, aggravated rape and criminal association in the slayings of six Ciudad Juarez women. In a verdict delivered by a different judge, six members of another gang, "Los Rebeldes," received between 24 and 40 years in prison for similar convictions in the deaths of six other women, said Rene Medrano, a spokesman for the state attorney general's office in Chihuahua, which includes Juarez.