France said on Wednesday that two of its citizens were among the seven people killed when militants drove a van into revelers and then went on a stabbing spree in central London on Saturday.
The foreign ministry said in a statement that a third French national was still missing and that four were gravely injured.
Le Parisien daily newspaper named the dead man as 36-year-old Sebastian Belanger.
London police said late on Tuesday that they feared a French tourist, 45-year-old Xavier Thomas, had been thrown into the River Thames by the attackers' van and drowned. His girlfriend was seriously injured in the collision.