At least one person was killed and many trapped and injured on Saturday when a passenger train derailed after striking a vehicle on a level crossing west of London, British Transport Police said. "At least nine carriages have been been derailed. Many people are injured and a significant number of passengers have been trapped," a police spokeswoman said. "There have been fatalities. Exact numbers are not known." At least 15 ambulances were lined up on the road near the crash site at Ufton Nervet in Berkshire, about 40 miles (65 km) west of London. The train from London's Paddington station to Plymouth in western England hit a car shortly after 6 p.m. (1800 GMT). Jonny Saunders, a correspondent for the BBC who happened to be on the train, told BBC News 24 television: "We came to a juddering halt. And then suddenly all the lights went off. Screaming and shouting. We were in pitch black and total chaos on the carriage for a few moments. "I was incredibly lucky because the carriage that I was in didn't actually go over on its side but the carriage in front of me did go over on its side and the carriage behind me went over on its side," he said. "I tried to get the hammer to break the glass. Managed to get out. We were lucky in our carriage. But there were certainly people who were less lucky." --SP 0106 Local Time 2206 GMT