Emergency crews have responded to Poulsbo Middle School after receiving reports that some students have become ill with suspected carbon monoxide poisoning. Jody Matson of the Poulsbo Fire Department said a nurse called for the emergency response after several students began displaying symptoms of carbon monoxide exposure. Matson said less than a dozen students in two classrooms had become sick. About 30 students are being evaluated as a precaution. It's likely that none of the students will need to be hospitalized, she said. But several ambulances responded to the school in case they might be needed. The affected students were in a shop classroom and an art classroom. Aerial footage from KOMO's Air 4 show that six ambulances and a fire crew have responded to the school.