A British student has spoken of how he was one of the first on the scene of a Grand Canyon helicopter crash which killed three people and left four others fighting for their lives.Conrad Fish spent seven hours helping emergency services after landing in a separate helicopter nearby during a sightseeing tour.As one of the first on the scene he told of how he found the survivors covered in wounds, with their clothes torn apart from the impact. The 19-year-old, who was at the Grand Canyon as part of his gap year, remained at the scene for seven hours with a friend to help carry supplies down a gorge to the victims. The teenager from Somerset said: “They were all in a very bad way – they had open wounds all over their bodies, and their clothes were completely torn off. “At first everyone ran over to the cliff edge to see what had happened.”Then a group of us started to collect things such as fire extinguishers, water, stretchers or really anything we could find that we thought might have helped.”The walk to where the crash took place was very slippery and rugged so it made getting supplies down very hard.”The survivors had managed to get clear of the helicopter when Conrad and his friend had reached the site.Video footage emerged showing one woman fleeing from the burning helicopter. Newlywed couple Jonathan Udall, 32, and Ellie Milward, 29, were critically injured alongside Jason’s girlfriend Jennifer Barham, 39, and pilot, Scott Booth, 42.The injured were forced to wait for nine hours to be rescued before being airlifted to a Las Vegas hospital at around 2am. “Adrenaline kicked in and all I did was help carry equipment down and help the fire brigade down. The real heroes were the doctors that kept the survivors alive.”I’m glad that I could help in some way, but I wouldn’t say I’m a hero.”The Eurocopter EC130 crashed in unknown circumstances around 5.20pm local time on Saturday killing brothers Jason and Stuart Hill, as well as Stuart’s girlfriend Becky Dobson, 22. Ellie Milward and Jonathan Udall remain in a critical condition Conrad Fish spent hours at the scene helping emergency services Conrad had landed in another helicopter shortly before the crash and recalled how if the circumstances had been slightly different, he could have been riding in the crash aircraft.”We were collected from a hotel near to where we were staying, and I was sat next to some of the victims on the bus,” he said.”However we had very little conversation with them and I didn’t even catch their names.”The group involved in the crash had made the trip to celebrate Stuart Hill’s 30th birthday.Conrad, a former pupil of Sherborne School in Dorset, had been travelling on his gap year with a friend and his parents, and staying near Las Vegas.He and his friend had decided to take a helicopter tour of the Grand Canyon on the day of the crash. Conrad said: “As the helicopter came down we were taking a picture, so I didn’t see the descent – but I heard a very loud bang behind us as the impact was made. Jason Hill was killed in the crash, along with his brother Stuart Jonathan Udall and Ellie Milward are in a critical condition, Becky Dobson and Stuart Hill both died in the crashCredit: Caters News Agency Conrad and his friend remained at the remote and inaccessible crash site to help until they were rescued.He said: “We were left and the priority was getting in rescue supplies, so we were given emergency blankets and sat in the bottom of the canyon.”We were flown out three at a time to a local fire/army base, where they assessed our health and then sent us to give statements and videos to the police.”An investigation into the crash, and into aerial tour company Papillion, who owned the helicopter, has been launched.Federal Aviation Administration spokesman Allen Kenitzer said that the Eurocopter EC130 in question had crashed in “unknown circumstances” and sustained heavy damage. Want the best of The Telegraph direct to your email and WhatsApp? Sign up to our free twice-daily Front Page newsletter and new audio briefings.