Shah-i Shahan agreed and the defenders soon ended their resistance, but instead of being spared like Timur had promised, the city was subjected to a three-day massacre.
It then destroyed the fortress of Taq and several dams and irrigation canals before making its way to Bust and ravaging it, which led to the abandonment of the old city (the location of which is marked by Qala-e-Bost).
He cleared Shahr-i Sistan of corpses and allowed the surviving people of the rural portions of the province to resettle on his own undamaged estates.
While in Sistan Shah-i Shahan continued to restore the province, rebuilding some of the dams and irrigation canals that had been destroyed by Timur's army.
Qutb al-Din Muhammad, who had also participated in the campaign against the Ottomans, was then appointed as the malik's successor by Timur.