French authorities are investigating the slashing of a Jewish teacher in Marseille, and the torching of two churches and the profanation of a mosque elsewhere in France.

The incidents point to heightened religious tensions in France less than two months after attacks by Islamic extremists in Paris left 130 people dead and hundreds injured. France's interior minister, Bernard Cazeneuve, described the stabbing Monday morning as a "revolting anti-Semitic aggression" and said the attack was under investigation.

Later Monday, Cazeneuve was visiting the Saint-Louis de Fontainebleau church, one of two damaged by fire on Sunday in the Paris region. Prosecutors opened an arson investigation. On Friday, Cazeneuve ordered a probe after a boar's head and racist inscriptions were found at Perpignan's main mosque.