A section of highway in the Northern Territory has been closed after five people died in a crash. Photo: Lloyd Jones/AAP PHOTOSA rescue attempt ended in tragedy after motorists tried to save victims of a horror head-on crash before the vehicles burst into flames, killing five people. (Lloyd Jones/AAP PHOTOS)A detour of about 2km was in place for one-way traffic on Thursday afternoon. (Lloyd Jones/AAP PHOTOS)Names of the dead had not been released but police believe they know the families involved and had contacted them, Commander Griffiths said. The tragedy would have a "long and deep impact" on all concerned, including family, friends and first responders, Commander Griffiths said.