In 1206, Mu'izz, having settled the affairs in India, left all the affairs in India in hands of his slave Qutbu l-Din Aibak.

On his way back to Ghazni, his caravan rested at Dhamiak near Sohawa (which is near the city of Jhelum in the Punjab province of modern-day Pakistan).
He was assassinated on March 15, 1206 while offering his evening prayers.
His killers are unconfirmed.
It may have been the Khokhars or 
Ismāʿīlīs.
One source states that he was assassinated by the Nizari Ismaili Assassins
In Indian folklore, the death of Mu'izz was caused by Prithviraj Chauhan, but this is not borne out by historical documents and Prithviraj died much earlier before the death of Mu'izz.
In 1206, Mu'izz, having settled the affairs in India, left all the affairs in India in hands of his slave Qutbu l-Din Aibak.
On his way back to Ghazni, his caravan rested at Dhamiak near Sohawa (which is near the city of Jhelum in the Punjab province of modern-day Pakistan). He was assassinated on March 15, 1206 while offering his evening prayers. His killers are unconfirmed. It may have been the Khokhars or 
Ismāʿīlīs. One source states that he was assassinated by the Nizari Ismaili Assassins
In Indian folklore, the death of Mu'izz was caused by Prithviraj Chauhan, but this is not borne out by historical documents and Prithviraj died much earlier before the death of Mu'izz.
Muhammad of Ghor