Pir Muhammad
Upon Timur's death in 1405, order in the region began to deteriorate. Iskandar took refuge with Pir Muhammad, now the ruler of Fars, who named him governor of Yazd. However, the two became alienated when Iskandar launched an invasion of Kerman, alarming his brother. He was captured by Pir Muhammad, who then confiscated his territory. Iskandar soon escaped and allying himself with their other brother Rustam, launched a failed siege of Pir Muhammad's capital of Shiraz. The latter in turn captured Rustam's capital of Isfahan, forcing the two princes out of the region. Iskandar wandered for sometime following this, before eventually being captured and taken to the court of Shah Rukh in Herat. Shah Rukh, who was both uncle and stepfather to the brothers, dispatched Iskandar to Shiraz, bearing a letter to Pir Muhammad requesting a pardon for the young prince.