Three people were wounded, including two seriously, when a gunman opened fire with an automatic weapon on a high-speed train traveling from Amsterdam to Paris Friday officials said, reports CBS News.
French media reported that US Marines on board the train overpowered the man. US Marine spokesman in Germany Captain Richard Ulsh told CBS News that "they can confirm that Americans subdued the gunmen" but he would not confirm whether they were Marines.
The suspect was arrested after the train stopped in Arras, 115 miles north of Paris,interior ministry spokesman Pierre-Henri Brandet said on French television BFM TV. Passengers were evacuated and police have secured the area.
Two of the victims were in critical condition, according to a statement from the office of President François Hollande.
The suspect is a 26-year-old Moroccan, said Sliman Hamzi, an official with police union Alliance, said on French television i-Tele.
Police are not ruling out the possibility of a planned terror attack, CBS News reports from Paris.
Twitter user @FreedomFilmLLC posted a photo showing the apparent aftermath of the shooting, saying the suspect was allegedly thwarted by US Marines.
Journalist Antoine da Silva posted a photo of a man apparently injured during the incident.
Christophe Piednoel, a spokesman for national railway operator SNCF, said the suspect was armed with an automatic rifle and a knife.
France's interior minister Bernard Cazeneuve was en route to Arras.
"The situation is under control, the travellers are safe. The train stopped and the emergency services are on site," the high-speed train operator Thalys tweeted in response to online requests for comments.
France has remained on a high state of alert since the terrorist attacks on the Charlie Hebdo magazine and a Jewish supermarket in Paris in January.