I'm assuming "subdued" involved many broken teeth and bones.
A gunman injured three people as he fired a Kalashnikov assault rifle on a train traveling between Amsterdam and Paris, The Telegraph report Aug. 21. French Interior Minister Bernard Cazeneuve is now en route to Arras, France, where the train stopped following the shooting. Three U.S. marines reportedly heard the attacker loading his weapon and subdued him. The gunman was also reportedly carrying a handgun, cartridges and possibly a knife, Le Monde reported. Some passengers fled the train as it passed through Henin-Beaumont. French police detained the 26-year-old suspect of Moroccan origin who was reportedly already known to French intelligence services, according to a police spokesman, AFP reported. The three injured passengers were French, American and British, La Parisien reported. Since the January shooting at the offices of the magazine Charlie Hebdo, French security personnel have been on high alert. [Stratfor]
Although actually the French don't allow their citizens to buy guns, so this actually couldn't have happened I guess.