Poison may have been sprayed into classrooms before students entered , police spokesman says . Students complained of headaches , fatigue and nausea ; many remain hospitalized . It 's the second such poisoning in a week 's period . A police spokesman blamed the government , which has ordered the closure of some schools .
Poison may have been sprayed into classrooms before girls entered , police spokesman says . Girls complained of headaches , dizziness and vomiting ; many remain hospitalized . It 's the second such poisoning in a week 's time . A police spokesman blamed the Taliban , which has demanded the closure of some schools .