Kelantan PAS Youth chief Mohamad Kamal Mohamed has called for a probe against those who leaked a letter on a purported bonus payout to the board and staff members of state water provider Air Kelantan Sdn Bhd (AKSB).

"Although the letter was meant to be confidential and was supposed to be accessible to only a select few, it has now been unfairly circulated to cast a negative perception against AKSB.