PARIS - French President Nicolas Sarkozy on Monday night announced to raise the terror alert to the highest level in southwestern France, where four people were killed at a Jewish school.

Sarkozy vowed to mobilize all means to find the gunman who shot dead four people earlier in the day at a Jewish school in the southwestern city of Toulouse.

The announcement came after the shooting took place outside the Ozar Hatorah Jewish school at around 8:00 am local time (0700 GMT), killing a professor, his two sons, and another 10-year-old student before the gunman fled on a motorbike.

The attack follows the killing of three soldiers in two similar shootings last week in Toulouse on March 11 and in nearby Montauban on Thursday.

Police officers gather at the site of a shooting in Jewish school in the southwestern French city of Toulouse on Monday morning. [Photo/Xinhua]