French defense contractor DCNS has been hit by a massive leak of secret data on its submarines likely to alarm India, Malaysia and Chile which use the boats, The Australian newspaper reported on Wednesday.

The 22,400 leaked pages, which the daily said it had seen, detail the combat capability of the Scorpene-class DCNS submarine designed for the Indian navy, variants of which are used by Malaysia and Chile.

Brazil is also due to deploy the vessels from 2018.