The Moroccan suspect in a foiled attack on a high-speed train in France is facing terrorism charges over what authorities say was a plan to unleash carnage among hundreds of passengers.
Ayoub El-Khazzani was charged overnight, the Paris prosecutor's office confirmed on Wednesday.
El-Khazzani was tackled and tied up by at least five passengers, including three Americans and a Briton.
The 26-year-old has denied terrorism plans and said he stumbled upon a bag of weapons and decided to rob passengers.
Paris prosecutor Francois Molins has said El-Khazzani watched a jihadi video on his mobile phone moments before the attack and that - although he claimed to be homeless - he used a first-class ticket.
Among the terrorism charges he faces are multiple counts of attempted murder, possession of weapons and conspiracy.
El-Khazzani's older brother, Imran, told French radio network RMC: "He could have gone crazy. His life was without a doubt difficult. He didn't have much money. It could have gone from bad to worse.
"I swear to you before God that my brother has nothing to do with a terrorist. We are Muslims. We respect people."