Two other folks were charged in Belgium over an August 2015 assault on a French high-speed train travelling from Amsterdam to Paris.
The pair have been charged with taking part in “the activities of a terrorist group”, prosecutors stated.
They are suspected of serving to Moroccan gunman Ayoub El-Khazzani, who was once overpowered through passengers, together with 3 Americans and a Briton, after he opened hearth at the Thalys train.
No one died within the incident.
The suspects charged have been amongst 4 other folks detained on Monday in Belgium after police raids. The different two other folks have been launched after being wondered.
Mr El-Khazzani, 26, is expecting trial in France.