PARIS: A heavily-armed gunman overpowered by passengers on a crowded train is “dumbfounded” by allegations of terrorism and denies any shot was fired, his lawyer said in comments broadcast Sunday.

The alleged attacker, named as 25-year-old Moroccan national Ayub El-Khazzani, on Friday evening boarded a high-speed train in Brussels bound for Paris armed with a Kalashnikov assault rifle, Luger automatic pistol, nine cartridge clips and a box-cutter.

Witnesses say he opened fire, injuring a man before being wrestled to the floor by three American passengers and tied up, until the train stopped in the northern French city of Arras where he was taken into police custody.