A Drug Enforcement Administration agent was killed and two other law enforcement officers were injured in a shooting aboard an Amtrak train in Tucson, Arizona, on Monday, officials said. #TucsonShooting #DEA #News #Reuters Subscribe: http://smarturl.it/reuterssubscribe Reuters brings you the latest business, finance and breaking news video from around the globe. Our reputation for accuracy and impartiality is unparalleled. Get the latest news on: http://reuters.com/ Follow Reuters on Facebook: https://www.facebook.com/Reuters Follow Reuters on Twitter: https://twitter.com/Reuters Follow Reuters on Instagram: https://www.instagram.com/reuters/?hl=en