A free-lance adventurer, Muhammad Bakhtyar Khalji, was moving further east. In 1200 AD he sacked the undefended university town of Odantpuri in Bihar… - `Abd al-Qadir Bada'uni

And in the year AH 912 (AD 1506), after the rising of the Canopus, he marched against the fortress of ÛntgaRh and laid siege to it, and many of his men joyfully embraced martyrdom, after that he took the fort and gave the infidels as food to the sword… He then cast down the idol-temples, and built there lofty mosques.

…In the second year after this arrangement Muhammad Bakhtyar brought an army from Behar towards Lakhnauti and arrived at the town of Nudiya, with a small force; Nudiya is now in ruins. Rai Lakhmia (Lakhminia) the governor of that town… fled thence to Kamran, and property and booty beyond computation fell into the hands of the Muslims, and Muhammad Bakhtyar having destroyed the places of worship and idol temples of the infidels founded Mosques and Monasteries and schools and caused a metropolis to be built called by his own name, which now has the name of Gaur. There where was heard before The clamour and uproar of the heathen, Now there is heard resounding The shout of 'Allaho Akbar'.

And in the year AH 698 (AD 1298) he appointed Ulugh Khan to the command of a powerful army, to proceed into the country of Gujarat… Ulugh Khan carried off an idol from Nahrwala… and took it to Dihli where he caused it to be trampled under foot by the populace; then he pursued Rai Karan as far as Somnat, and a second time laid waste the idol temple of Somnat, and building a mosque there retraced his steps.