BEACH PARK, Ill. (AP) — Seven people, including a firefighter, remain in intensive care after being injured in an ammonia leak.
Lake County Sheriff’s spokesman Christopher Covelli said Friday the majority of the 37 people injured Thursday have been treated and released from hospitals.
Toxic gas plumes formed and lingered for several hours when anhydrous ammonia leaked from containers being pulled by a tractor. The injured included 11 firefighters and three police officers.
Sheriff’s detectives and a team from the National Transportation Safety Board are jointly investigating the leak Friday. It could be more than a week before a cause is determined.