(JTA) — Two French Jewish men were attacked while on their way to synagogue.

The men, brothers aged 18 and 21 from the Paris suburb of Creteil, were attacked from behind Sunday by two men on bicycles, according to a statement from the French Jewish organization SPCJ. The attackers, men in their twenties, wore brass knuckles and hit the brothers in the face. The attackers fled after the brothers defended themselves.

A passing car stopped to pick the men up and drove them to the hospital. According to SPCJ, the men’s faces are “heavily injured,” and  will need surgery, but the men are expected to recover.

The attack comes one day after four people died in a shooting at the Jewish Museum of Brussels. Police are still searching for a suspect in the shooting.