A 15-year-old supporter of the "Islamic State" (ISIS) terrorist group who slashed a Jewish teacher with a machete in southern France has said he was "proud" of his attack, ahead of a court appearance Wednesday, AFP reports.

The teenager, an ethnic Kurd from Turkey, told police he did not regret the assault on a Jewish teacher in Marseille, the latest in a string of such attacks in recent months.

A source close to the investigation told local media the boy had said he was "ashamed" that he did not manage to kill the 35-year-old teacher, Benjamin Amsellem.