A French police official says the gun used to kill four people at a Jewish school Monday was the same gun used in attacks on three French paratroopers last week.

Police had been investigating a connection between the attacks after a gunman opened fire outside Ozar Hatorah school in the southwestern French city of Toulouse, killing a rabbi, his two sons and one other child, according to the prosecutor's office.

Prosecutor Michel Valet said a 30-year-old rabbi and his 3-year-old and 6-year-old sons were killed in the attack just before classes started at the Ozar Hatorah school. 

Another child, the 8-year-old daughter of the school principal, was also killed, school officials said. Valet said a 17-year-old boy was also seriously wounded and in the operating ward of a city hospital.

"The drama occurred a bit before 8 a.m. A man arrived in front of the school on a motorcycle or scooter," Valet said, adding that the man got off his scooter outside the school and opened fire.