The 25-year-old nephew of French Prime Minister Édouard Philippe was attacked last Wednesday while hanging out with friends in the southern Israeli city of Eilat.
A police cruiser driving near the boardwalk noticed three young French tourists lying on the ground, suffering from stab wounds in their upper bodies. Two sustained light wounds while the third's injuries were slightly more serious.
An Eilat police spokespman said the tourists had been accosted by a group of men who hit and stabbed them before fleeing the site. The attackers are believed to be Israeli.
The victims were immediately rushed to the Yoseftal Medical Center in the city. Two of them were released the next morning while the third remained at the hospital.
The police launched an investigation into the incident. So far, no suspects have been arrested. The evidence provided by the victims is all the police have for now.
The French Embassy issued no comment.