A boy of 15 has been arrested in Paris on suspicion of preparing an imminent terrorist attack, French judicial sources have said.

It comes only a week after French police said they had foiled another terrorist plot to attack a train station by three women who were said to have been directed by so-called Islamic State.

The teenage boy, who has not been named, is said to have been planning an attack in a public place in the French capital, one of the legal sources said.

He is also alleged to have been in contact with an Islamist fighter in Syria alleged to have helped guide one of the women in the earlier terror plot, according to the second source.