One of the two girls who died at an Arizona high school has been identified by a family member as May Kieu. “Both sustained a single gunshot wound,” said police officer Tracey Breeden, “and the weapon was found near them.” The school remained on lockdown for several hours. Breeden said authorities do not know what instigated the shooting or what the 15-year-old girls’ relationships to each other were. Breeden also said the manner of the deaths has not been determined. The girls’ names have not been released yet. Students were released to parents later Friday when the lockdown ended.