French police are hunting for a gunman who shot dead four people, including three children, at a Jewish school in the city of Toulouse, prompting President Nicolas Sarkozy to put the region on its highest terrorism alert.
More than a 100 officers were dispatched to the area on Monday to search for the gunman, who is also a prime suspect in the killing of three soldiers in two seperate shooting last week..
As thousands held vigils for the latest victims, a police source told the AFP news agency that the same weapon and the same stolen scooter appeared to have been used in all three attacks.
All three attacks were carried out by the rider of a powerful, dark-coloured scooter, using a .45-calibre weapon, who witnesses described as calmly shooting his victims at point-blank range.
In carrying out the killings outside the Ozar Hatorah school on Monday, the shooter opened fire with a 9mm calibre weapon, which jammed.
He then produced a second weapon, a pistol of the same .45 calibre as that used in the other attacks, and chased children into the school to continue his spree.
Possible pattern
Al Jazeera's Jacky Rowland, reporting from Toulouse, said that people were particularly concerned by the sense that a pattern of killings was emerging.
"It would seem to be a huge coincidence otherwise; over the space of eight days you have three attacks, all of which involve an attacker on a motorcycle wearing a black helmet and the same sort of gun. So the evidence is starting to stack up."