article_snippet: Explosion: The resulting gas cloud (pictured) left nearby troops feeling nauseous and many had to be treated for vomiting, dizziness and general weakness .
article_snippet: A Kurdish official said dozens of peshmerga fighters were treated for 'dizziness, nausea, vomiting and general weakness' after a suicide bomb attack in Iraq.
highlights_snippet: Troops there were treated for 'dizziness, vomiting and general weakness'
  Analysis of soil and clothing revealed chlorine, Kurdish authorities claim .
  