Panama has hit back at accusations it is a secretive offshore hub spurred by a huge data leak, sending a letter Tuesday to the head of the OECD saying such allegations were "unfair and discriminatory."

The country's deputy foreign minister, Luis Miguel Hicapie, said in the letter addressed to the OECD's Angel Gurria that, in the wake of the so-called Panama Papers revelations, he had made "allegations and insinuations whose falsity is easily demonstrated."