Under the patronage of Crown Prince Naif bin Abdulaziz Al Saud, Deputy Premier and Minister of Interior, the Public Security Training City in Riyadh will celebrate tomorrow the graduation of a new batch of qualifying courses comprising of 4,107 trainees. The Director of Public Security, General Saeed bin Abdullah Al-Qahtani, commended in a statement on this occasion, the Crown Prince for his unlimited support for security sectors to preserve the homeland's security and stability.