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

The official said the gunman who shot and killed three children and a rabbi at the school in the southwestern city of Toulouse on Monday fired 15 shots from the gun.

The official says the same gun was used in the two attacks last week. One of those attacks, in Toulouse, killed a paratrooper. The other one, in nearby Montauban, killed two paratroopers and left another seriously injured.

The official is not authorized to be named because the investigation is under way.

The motive for the killings is unclear.

(Source: ABC)