Upon his death, his older son Ala ud-din Sikandar Shah became sultan, but he soon died of illness on 8 March 1394, and his younger brother Nasiruddin Mahmud succeeded him.

[1][2] During Nasiruddin Mahmud's reign in 1398, Timur the Chagatai ruler invaded India.

He obtained a substantial number of treasures from the Delhi court that was accumulated by the Turco-Afghan predecessors for over a period of 192 years (1206 CE-1398 CE).

Due to these regions breaking away, the Delhi Sultanate shrunk significantly and began to weaken.

Khizr Khan was the governor of Multan and he was appointed as the Sultan of Delhi by Timur himself.