Three French schoolchildren were among those injured when a vehicle hit people on London's Westminster Bridge in a suspected terror attack, the French government has confirmed, reports BBC News.
The foreign ministry said they had been on a school trip to London.
A newspaper in France's Brittany region, Le Télégramme, identified them as teenage pupils from a private high school in Concarneau.
All three are in a critical condition, it said.
Witnesses the paper quoted said a pupil had ended up on the car bonnet.
Parents have begun gathering at the school, the Lyceée Saint-Joseph.
Four people, including a police officer and a man believed to be the attacker, were killed and a total of 20 injured in Wednesday's attack near the UK's Houses of Parliament, Scotland Yard confirmed.
The car which hit pedestrians crashed into railings.
The group, aged 15-16, were walking on the bridge when they were hit by the car, Le Télégramme reported.
Those of the group not injured were extremely traumatised, the BBC's Nick Robinson said, after meeting them just after the attack.
One of them told him he had seen the car drive into the group.
Pupils who were not hurt were put on a boat for security, after which they were able to return to the youth hostel where they had been staying since Sunday evening, Le Télégramme reported.
The hostel is trying to get them back to France as soon as possible, the paper adds.
President François Hollande expressed his "solidarity" with the British people, saying "terrorism concerns us all and France knows how the British people are suffering today".