His brother Ala al-Dawla Mirza, after his defeat at the Battle of Tarnab, sought refuge with him at Quchan.

The leader of the Uzbeks, Abul-Khayr Khan, had invaded Transoxiana and raided the suburbs of Samarkand.

[1] Ulugh Beg was at that time chasing after Ala al-Dawla Mirza and had reached Bistam and Pul-e-Ibrahim.

[1] When Ulugh Beg was crossing the river Amu Darya, he was attacked and looted by the Uzbeks.

[1] He then rushed towards the city of Bukhara and stayed the winter there, and sent the body of Shahrukh Mirza ahead to Samarkand to be buried in Timur's mausoleum.