Primary / Secondary School, School / University Classroom fire contained by sprinkler system at high school (El Paso, TX) March 13, 2012 viking210 A Molotov cocktail or incendiary device was thrown through a window at El Dorado High School early Sunday morning. The School District said the device started a fire which triggered a sprinkler system. The classroom, which is used to teach English courses, should be cleaned up and operational by Wednesday.