In the years following Timur's death, Shah Rukh and Khalil Sultan had a series of unproductive negotiations as well as many military encounters, with Khalil Sultan frequently emerging victorious. During this time, other pretenders also pursued their own claims to the throne. Among these was Sultan Husayn Tayichiud, a maternal grandson of Timur who later aligned himself with Khalil Sultan, before betraying him in order to reassert his own claim. Sultan Husayn was defeated by his former ally and fled to Shah Rukh, who had him executed, with his body parts being displayed in the bazaars of Herat. Two more of Timur's grandsons, Iskandar and Pir Muhammad, also made bids for the throne. They were defeated by Shah Rukh and Khalil Sultan respectively, with each being spared by their subjugator. Pir Muhammad was later assassinated by one of his nobles in 1407, while Iskandar was executed in 1415 following a failed rebellion.