Three British tourists were killed and four other people injured when a helicopter crashed in the Grand Canyon on Saturday afternoon.[View the story "3 people killed after helicopter crashes in Grand Canyon, investigators say" on Storify]3 people killed after helicopter crashes in Grand Canyon, investigators sayThree people were killed when a helicopter crashed near the Grand Canyon Saturday afternoon. Storified by CMGNationalNews· Sun, Feb 11 2018 04:22:57The tour helicopter, which had seven passengers, sustained substantial damage and crashed under unknown circumstances around 5:30 p.m., according to KNXV.BREAKING: Helicopter has reportedly crashed at the Grand Canyon. 3 confirmed dead. https://t.co/MLhccn8jJH https://t.co/S9D4oFXq5mazfamily 3TV CBS 5BREAKING: A #LasVegas based tour helicopter has crashed near the #GrandCanyon. Early reports indicate 7 people on board, 3 confirmed dead. Stay with @News3LV for more on this developing story.Gerard Ramalho"(The helicopter) crashed under unknown circumstances in the Grand Canyon," Allen Kenitzer, a spokesman with the FAA, told KNXV. BREAKING: Helicopter has reportedly crashed at the Grand Canyon. At least 7 people were on board. Open app for latest from FAA Office of Communications.(Via azfamily 3TV CBS 5) https://t.co/CPPvKOvPTSBRANDON LEE 3TVAuthorities are still searching for some of the other passengers, according to KNXV. Other injuries are unknown, according to KPHO.The FAA and NTSB are investigating.