A helicopter carrying seven people went down in the Grand Canyon Saturday under unknown circumstances. Officials say at least three people were killed, and four others were injured. The passengers who were killed were identified as 27-year-old Becky Dobson, 32-year-old Jason Hill and 30-year-old Stuart Hill. Those injured are the pilot, 42-year-old Scott Booth and passengers 29-year-old Ellie Milward, 32-year-old Jonathan Udall and 39-year-old Jennifer Barham. All of the passengers were from England. The helicopter is owned by Papillon Airways, which is a tour company based in Las Vegas. The aircraft went down at around 5:20 p.m. near Quartermaster Canyon on the Hualapai Reservation in the Canyon. Rescue crews had to wait until 2 a.m. Sunday to get to the crash site due to high winds and bad weather in the area. Officials say the injured waited about eight hours to be airlifted from the crash site and taken to the hospital. FAA officials are on the scene, while members of the National Transportation Safety Board will be on scene over the next few days.