Terror attack? At least four shot dead at Jewish school in Toulouse, France Updated at 7.10 a.m ET: At least four people, including three children and a rabbi, were shot dead by a gunman at a Jewish school in Toulouse, France, on Monday, officials said. The killings - described as "a vision of horror" by a parent of a child at the school - happened just days after three French soldiers were shot dead in two separate incidents in the area and a French government minister noted "similarities" between the incidents. Paris prosecutors said in a statement Monday that they were opening anti-terrorism investigations into all three incidents. The shooter fled the private Ozar Hatorah school -- located in Jolimont district of Toulouse -- on a black scooter, NBC News reported, citing Le Figaro newspaper; other reports described the vehicle as a motorbike. Several other people were injured, two of them seriously, Reuters said. 'I did not find my son' Parents who witnessed the incident -- that happened shortly before 8 a.m. local time (3 a.m. ET), as children were being dropped off at the school -- described the scene. How can they attack something as sacred as a school, attack children only sixty centimeters (about two feet) tall?" he added. It was terrible ... It felt like it lasted a long time," Charles Ben Semoun, a parent of a child at the school, told i-tele television, the Bloomberg news service said on its website. NBC News, citing France's Le Monde newspaper, reported that the gunman had two weapons. Witnesses said the shooter opened fire from the scooter, but this gun jammed. The gunman then left the scooter and ran into the school yard and started shooting with another weapon, the witnesses added. PhotoBlog: Images from the scene of the Toulouse school shooting Monday's shootings come days after three soldiers were killed in two separate shootings in the same area by a man who also escaped from the scene by scooter, Reuters reported. French TV station BFM said that the gun used in the attack at the school was of the same caliber as that used in the soldiers' shootings. 'Horrible attack' French Interior Minister Claude Gueant, who reportedly broke off a visit to another part of France to go to Toulouse, said that "one can't fail to notice the similarities between the attacks on our troops in Toulouse and in (the nearby town of) Montauban and then this horrible attack on children this morning," according to a Sky News report. Investigators said Friday that the murders of two French paratroopers in southwest France Thursday were linked to the killing of another soldier in Toulouse at the previous weekend, after they discovered the same weapon was used in both crimes. Two uniformed French soldiers were shot dead and a third seriously injured by a masked gunman Thursday as they tried to withdraw money from a cash machine in Montauban, close to the barracks of the 17th paratroop regiment. In the first shooting, a 30-year-old soldier in civilian clothes was shot dead in Toulouse.