He may have poisoned him as well, since the old man died suspiciously soon afterwards.

From The Middle Sea by John Julius Norwich. Chapter 14.

A testament to the continuing complexity and violence of the mideast. From five hundred years ago and it is not a far description of today's headlines.

In 1512 Bayezit’s son Selim rebelled against his father and forced him to abdicate in his favour. (He may have poisoned him as well, since the old man died suspiciously soon afterwards.) Selim I, as he now became, was always known as Yavuz, ‘the Grim’. His first act as Sultan was to eliminate, as potential rivals to the throne, his two brothers and five orphan nephews–the youngest of whom was five years old–by having them strangled with a bowstring; he is said to have listened with satisfaction to their screams from an adjoining room. He then turned his attention to the east, directing his formidable energies against Ismail I, the founder of the Safavid dynasty in Iran, massacring some 40,000 and incorporating various Kurdish and Turkoman principalities in eastern Anatolia into his empire. His next objective was Syria, still in the hands of the Mamelukes. Aleppo, Damascus, Beirut and Jerusalem fell in quick succession, and on 24 August 1516, at the battle of Marj Dabik, he effectively destroyed the Mameluke dynasty; its penultimate sultan, al-Ghawri, died on the field. In Egypt al-Ghawri’s nephew Tuman Bey proclaimed himself Sultan and refused to submit, whereupon Selim marched his army across the Sinai desert and after one more particularly bloody encounter–at Raydaniye, near the Pyramids, in January 1517–captured him and had him hanged at the gates of Cairo. Six months later the Sherif of Mecca made voluntary submission in his turn, sending Selim the standard and cloak of the Prophet and the keys of the Holy Cities. At last, with Egypt, Syria and the Hejaz all acknowledging him as their sovereign, the Sultan returned in triumph to the Bosphorus. His empire was not only increased; it was transformed. Possession of Mecca and Medina made it an Islamic Caliphate; henceforth the Ottoman Sultans were to consider themselves protectors of the Muslim world.