Here is a summary of what we know so far about the suspected terror attack on a French train:
A gunman opened fire on a high-speed train travelling from Amsterdam to Paris at 4pm local time on Friday.
He was arrested at Arras Station in northern France after being overpowered by passengers including three Americans, two of whom are in the US military and a 62-year-old British businessman.
Who was wounded?
Three people were injured in the attack, including an American national and a Frenchman.
The Frenchman who was injured was actor Jean-Hugues Anglade, who sounded the alarm and suffered a minor injury to his hand after breaking the glass
Another unidentified passenger is thought to have been shot during the incident
The Foreign Office told ITV News that there had been "no reports" of British casualties
What do we know about the suspect?
The suspect is believed to be a 26-year-old of Moroccan origin who was reportedly under French police surveillance after foreign security services identified him as dangerous
He was carrying a Kalashnikov assault rifle, a handgun and a knife
A picture posted on Twitter showed a man being arrested on a platform
Is it a terrorist attack?
Anti-terror police have launched an investigation into the attack but government officials said it was "premature" to talk about a terrorist motive