European ministers have agreed tighter controls at railway stations, the French interior minister has announced, reports the BBC.
Bernard Cazeneuve said there would be increased identity and baggage controls at stations and more police patrols on board international trains.
France called the emergency meeting in Paris, attended also by security and transport officials, after the foiled attack on a train on 21 August.
A heavily-armed man was overpowered on the Amsterdam to Paris train.
French prosecutors have filed charges against 25-year-old Ayoub El-Khazzani.
But questions have been raised about how someone was able to board the train in Brussels carrying an assault rifle, 270 rounds of ammunition, a handgun, a box-cutter and petrol.
Mr Cazeneuve announced a raft of tighter security measures after meeting with ministers from Germany, Italy, Spain, Belgium, Luxembourg, the Netherlands and Switzerland as well as the UK.