Four people were killed in a fiery plane crash in Green County. The Green County Sheriff’s office says two teens, along with their mother and grandmother were on board a light aircraft Sunday and died when it crashed in a wooded area. The grandmother was piloting when the plane took off from Kenosha and was heading to Monroe Municipal Airport when it went down. Sheriff’s officials say the plane was completely engulfed in flames when first responders arrived on scene. Authorities are assuming there were mechanical problems with the plane. The Federal Aviation Administration (FAA) and an investigator with the National Transportation Safety Board is assessing the crash site. A witness called 9-1=1 when they saw and heard the plane descend and catch fire just after noon. The names of the victims have not been released.